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Message boards : 321 Prime Search : 321 Sieve

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Profile Skivelitis2
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Joined: 28 Mar 15
Posts: 37
ID: 388656
Credit: 38,963,413
RAC: 234,264
321 LLR Silver: Earned 100,000 credits (138,799)Cullen LLR Silver: Earned 100,000 credits (432,662)ESP LLR Silver: Earned 100,000 credits (339,083)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (117,623)PPS LLR Silver: Earned 100,000 credits (317,542)PSP LLR Silver: Earned 100,000 credits (497,016)SoB LLR Silver: Earned 100,000 credits (469,463)SR5 LLR Silver: Earned 100,000 credits (183,039)SGS LLR Silver: Earned 100,000 credits (144,687)TRP LLR Silver: Earned 100,000 credits (108,162)Woodall LLR Silver: Earned 100,000 credits (472,680)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (7,525,333)PPS Sieve Sapphire: Earned 20,000,000 credits (20,016,998)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (500,162)TRP Sieve (suspended) Gold: Earned 500,000 credits (500,031)AP 26/27 Turquoise: Earned 5,000,000 credits (5,001,191)GFN Ruby: Earned 2,000,000 credits (2,210,410)
Message 124583 - Posted: 9 Jan 2019 | 13:40:10 UTC
Last modified: 9 Jan 2019 | 13:40:43 UTC

Noticed the 321 Prime Sieve "coming soon". Great news! Will this wait until the conclusion of the current challenge?

Profile Michael GoetzProject donor
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,004,898)PPS LLR Ruby: Earned 2,000,000 credits (2,082,200)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (26,156,052)SR5 LLR Turquoise: Earned 5,000,000 credits (7,371,106)SGS LLR Ruby: Earned 2,000,000 credits (2,010,466)TRP LLR Ruby: Earned 2,000,000 credits (2,433,520)Woodall LLR Ruby: Earned 2,000,000 credits (2,176,414)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,086,053)GFN Emerald: Earned 50,000,000 credits (57,229,526)PSA Jade: Earned 10,000,000 credits (10,038,118)
Message 124592 - Posted: 9 Jan 2019 | 15:08:16 UTC - in response to Message 124583.

Noticed the 321 Prime Sieve "coming soon". Great news! Will this wait until the conclusion of the current challenge?



Certainly.

There's off-line preparatory steps that won't be finished until at least the 24th so it can't start before then.

Current thinking is that we'll probably wait until after TdP and start in mid-March, but our plans are tentative and might change.
____________
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Joined: 12 Apr 11
Posts: 118
ID: 94709
Credit: 95,663,406
RAC: 1,414,966
321 LLR Gold: Earned 500,000 credits (991,912)ESP LLR Silver: Earned 100,000 credits (120,950)PPS LLR Ruby: Earned 2,000,000 credits (2,000,400)PSP LLR Silver: Earned 100,000 credits (100,904)SoB LLR Gold: Earned 500,000 credits (623,454)SR5 LLR Silver: Earned 100,000 credits (100,145)SGS LLR Silver: Earned 100,000 credits (100,010)TRP LLR Ruby: Earned 2,000,000 credits (2,001,961)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,061)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,000,096)PPS Sieve Emerald: Earned 50,000,000 credits (50,000,422)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,500)AP 26/27 Ruby: Earned 2,000,000 credits (2,001,285)GFN Jade: Earned 10,000,000 credits (10,719,108)PSA Sapphire: Earned 20,000,000 credits (20,882,198)
Message 124593 - Posted: 9 Jan 2019 | 15:40:11 UTC

Soon...

Profile Eudy SilvaProject donor
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ID: 918937
Credit: 110,700,240
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Found 2 primes in the 2018 Tour de Primes321 LLR Gold: Earned 500,000 credits (514,786)Cullen LLR Gold: Earned 500,000 credits (508,598)ESP LLR Gold: Earned 500,000 credits (506,993)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (511,805)PPS LLR Ruby: Earned 2,000,000 credits (4,275,412)PSP LLR Gold: Earned 500,000 credits (742,121)SoB LLR Amethyst: Earned 1,000,000 credits (1,549,712)SR5 LLR Amethyst: Earned 1,000,000 credits (1,410,219)SGS LLR Amethyst: Earned 1,000,000 credits (1,087,165)TRP LLR Amethyst: Earned 1,000,000 credits (1,014,760)Woodall LLR Gold: Earned 500,000 credits (571,695)Generalized Cullen/Woodall Sieve Amethyst: Earned 1,000,000 credits (1,005,331)PPS Sieve Emerald: Earned 50,000,000 credits (58,018,281)AP 26/27 Jade: Earned 10,000,000 credits (18,953,584)GFN Sapphire: Earned 20,000,000 credits (20,029,778)
Message 124594 - Posted: 9 Jan 2019 | 15:59:06 UTC - in response to Message 124593.
Last modified: 9 Jan 2019 | 15:59:47 UTC

chip wrote:
Soon...




:)
____________
"Accidit in puncto, quod non contingit in anno."
Something that does not occur in a year may, perchance, happen in a moment.

Profile Skivelitis2
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Joined: 28 Mar 15
Posts: 37
ID: 388656
Credit: 38,963,413
RAC: 234,264
321 LLR Silver: Earned 100,000 credits (138,799)Cullen LLR Silver: Earned 100,000 credits (432,662)ESP LLR Silver: Earned 100,000 credits (339,083)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (117,623)PPS LLR Silver: Earned 100,000 credits (317,542)PSP LLR Silver: Earned 100,000 credits (497,016)SoB LLR Silver: Earned 100,000 credits (469,463)SR5 LLR Silver: Earned 100,000 credits (183,039)SGS LLR Silver: Earned 100,000 credits (144,687)TRP LLR Silver: Earned 100,000 credits (108,162)Woodall LLR Silver: Earned 100,000 credits (472,680)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (7,525,333)PPS Sieve Sapphire: Earned 20,000,000 credits (20,016,998)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (500,162)TRP Sieve (suspended) Gold: Earned 500,000 credits (500,031)AP 26/27 Turquoise: Earned 5,000,000 credits (5,001,191)GFN Ruby: Earned 2,000,000 credits (2,210,410)
Message 124639 - Posted: 10 Jan 2019 | 1:54:30 UTC

Thank you for the concise answer as usual Michael. Would one be wise to assume a "30 day notice" for GCW Sieve will be concurrent with the start of the 321 Sieve?

Profile Michael GoetzProject donor
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Joined: 21 Jan 10
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Credit: 159,918,411
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,004,898)PPS LLR Ruby: Earned 2,000,000 credits (2,082,200)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (26,156,052)SR5 LLR Turquoise: Earned 5,000,000 credits (7,371,106)SGS LLR Ruby: Earned 2,000,000 credits (2,010,466)TRP LLR Ruby: Earned 2,000,000 credits (2,433,520)Woodall LLR Ruby: Earned 2,000,000 credits (2,176,414)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,086,053)GFN Emerald: Earned 50,000,000 credits (57,229,526)PSA Jade: Earned 10,000,000 credits (10,038,118)
Message 124640 - Posted: 10 Jan 2019 | 2:04:00 UTC - in response to Message 124639.

Thank you for the concise answer as usual Michael. Would one be wise to assume a "30 day notice" for GCW Sieve will be concurrent with the start of the 321 Sieve?


No. Unless there's some reason for a significant delay to the start of the 321 sieve, there will be significantly more than 30 days until the start of 321 Sieve and the end of GCW sieve.
____________
Please do not PM me with support questions. Ask on the forums instead. Thank you!

My lucky number is 75898524288+1

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Credit: 12,398,953,966
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Discovered 7 mega primesEliminated 2 conjecture "k"sDiscovered 2 AP26sDiscovered 1 twin prime2017 Tour de Primes highest prime count2017 Tour de Primes most Mountain Stage primes2018 Tour de Primes most Mountain Stage primesFound 4 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 4 primes in the 2018 Tour de Primes Mountain StageFound 1 mega prime in the 2018 Tour de Primes Mountain Stage321 LLR Emerald: Earned 50,000,000 credits (52,964,603)Cullen LLR Emerald: Earned 50,000,000 credits (58,024,172)ESP LLR Emerald: Earned 50,000,000 credits (53,384,998)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (70,633,723)PPS LLR Double Bronze: Earned 100,000,000 credits (100,502,402)PSP LLR Emerald: Earned 50,000,000 credits (51,603,689)SoB LLR Double Bronze: Earned 100,000,000 credits (183,046,115)SR5 LLR Emerald: Earned 50,000,000 credits (52,541,942)SGS LLR Emerald: Earned 50,000,000 credits (54,944,236)TRP LLR Double Bronze: Earned 100,000,000 credits (109,492,324)Woodall LLR Emerald: Earned 50,000,000 credits (58,962,100)321 Sieve (suspended) Ruby: Earned 2,000,000 credits (2,031,883)Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,879,764)Generalized Cullen/Woodall Sieve Double Bronze: Earned 100,000,000 credits (100,428,955)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (3,008,139,439)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Double Bronze: Earned 100,000,000 credits (101,857,516)TRP Sieve (suspended) Emerald: Earned 50,000,000 credits (50,936,081)AP 26/27 Double Gold: Earned 500,000,000 credits (717,381,834)GFN Double Ruby: Earned 2,000,000,000 credits (2,563,469,807)PSA Double Ruby: Earned 2,000,000,000 credits (4,977,728,930)
Message 124641 - Posted: 10 Jan 2019 | 2:21:54 UTC
Last modified: 10 Jan 2019 | 2:27:22 UTC

Would anyone from the project care to comment on why the 321 sieve is being restarted (besides giving me the opportunity to improve my badge)?
____________

Profile Michael GoetzProject donor
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,004,898)PPS LLR Ruby: Earned 2,000,000 credits (2,082,200)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (26,156,052)SR5 LLR Turquoise: Earned 5,000,000 credits (7,371,106)SGS LLR Ruby: Earned 2,000,000 credits (2,010,466)TRP LLR Ruby: Earned 2,000,000 credits (2,433,520)Woodall LLR Ruby: Earned 2,000,000 credits (2,176,414)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,086,053)GFN Emerald: Earned 50,000,000 credits (57,229,526)PSA Jade: Earned 10,000,000 credits (10,038,118)
Message 124642 - Posted: 10 Jan 2019 | 2:36:07 UTC - in response to Message 124641.

Would anyone from the project care to comment on why the 321 sieve is being restarted?


321 is currently sieved up to n=25M. The current leading edge is n=14.6M. We're going to sieve 25M < n < 50M. That would bring the 321 sieve up to the same point to which we've sieved the conjecture projects. The sieving should take several years, and we'd like to get the sieving done before LLR reaches 25M. 321, having just a single k, and the smallest of all possible k's, could advance very quickly if people concentrated on it.

Additionally, with GCW sieve likely to be ending sometime this year, we did want to have another CPU sieve project to take its place. It's a good time, therefore. to reopen 321 sieving.
____________
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My lucky number is 75898524288+1

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Credit: 914,062,936
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Found 2 primes in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,644,450)Cullen LLR Turquoise: Earned 5,000,000 credits (6,520,294)ESP LLR Jade: Earned 10,000,000 credits (10,046,953)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,007,848)PPS LLR Jade: Earned 10,000,000 credits (17,369,276)PSP LLR Turquoise: Earned 5,000,000 credits (8,755,464)SoB LLR Jade: Earned 10,000,000 credits (11,129,293)SR5 LLR Jade: Earned 10,000,000 credits (10,050,617)SGS LLR Jade: Earned 10,000,000 credits (10,004,392)TRP LLR Jade: Earned 10,000,000 credits (11,004,157)Woodall LLR Turquoise: Earned 5,000,000 credits (6,689,668)321 Sieve (suspended) Bronze: Earned 10,000 credits (38,652)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,178,073)Generalized Cullen/Woodall Sieve Sapphire: Earned 20,000,000 credits (31,440,375)PPS Sieve Double Silver: Earned 200,000,000 credits (276,640,988)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (9,468,384)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,076,645)AP 26/27 Double Silver: Earned 200,000,000 credits (209,628,585)GFN Double Bronze: Earned 100,000,000 credits (160,498,021)PSA Double Bronze: Earned 100,000,000 credits (102,878,562)
Message 124648 - Posted: 10 Jan 2019 | 4:39:55 UTC

Excellent news!...in a sense. While I look forward to moving that bronze stain off my badge list and getting something brighter, I have one pre-AVX cpu left: A Xeon X5675. It's been relegated to sieving only (if there isn't an SGS/PPSE challenge) and I was going to finally retire the system (most of it still being the original i7-920 build from 2009) after GCW sieve ended, but now, I suppose it's gotten a stay of execution so long as we're using the old sieve program. Or is mtsieve going to make its debut here?
____________
Eating more cheese on Thursdays.

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ID: 55391
Credit: 471,981,624
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Discovered 2 mega primesFound 1 prime in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,090,406)Cullen LLR Gold: Earned 500,000 credits (776,297)ESP LLR Amethyst: Earned 1,000,000 credits (1,542,446)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,719,804)PPS LLR Turquoise: Earned 5,000,000 credits (7,842,700)PSP LLR Ruby: Earned 2,000,000 credits (3,777,949)SoB LLR Jade: Earned 10,000,000 credits (13,381,540)SR5 LLR Turquoise: Earned 5,000,000 credits (5,978,312)SGS LLR Ruby: Earned 2,000,000 credits (2,898,319)TRP LLR Turquoise: Earned 5,000,000 credits (6,582,501)Woodall LLR Amethyst: Earned 1,000,000 credits (1,693,614)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,228,005)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,571,178)Generalized Cullen/Woodall Sieve Sapphire: Earned 20,000,000 credits (40,979,131)PPS Sieve Double Silver: Earned 200,000,000 credits (200,517,814)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,165,888)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,071,454)AP 26/27 Ruby: Earned 2,000,000 credits (2,544,827)GFN Sapphire: Earned 20,000,000 credits (36,858,531)PSA Double Bronze: Earned 100,000,000 credits (102,762,384)
Message 124649 - Posted: 10 Jan 2019 | 4:52:46 UTC - in response to Message 124648.

Excellent news!...in a sense. While I look forward to moving that bronze stain off my badge list and getting something brighter, I have one pre-AVX cpu left: A Xeon X5675. It's been relegated to sieving only (if there isn't an SGS/PPSE challenge) and I was going to finally retire the system (most of it still being the original i7-920 build from 2009) after GCW sieve ended, but now, I suppose it's gotten a stay of execution so long as we're using the old sieve program. Or is mtsieve going to make its debut here?

It's not a stain to me. I'm trying to retain the whole gamut of badge levels.
It hasn't worked too well with challenges, and I was a bit disappointed when the badge upgrades happened a number of years ago. Probably the only person who was disappointed LOL.

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Posts: 806
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Credit: 686,547,289
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321 LLR Ruby: Earned 2,000,000 credits (2,054,472)Cullen LLR Ruby: Earned 2,000,000 credits (2,500,846)ESP LLR Ruby: Earned 2,000,000 credits (3,823,612)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,157,923)PPS LLR Ruby: Earned 2,000,000 credits (2,100,471)PSP LLR Turquoise: Earned 5,000,000 credits (5,013,650)SoB LLR Sapphire: Earned 20,000,000 credits (25,260,854)SR5 LLR Jade: Earned 10,000,000 credits (10,153,648)SGS LLR Ruby: Earned 2,000,000 credits (2,000,775)TRP LLR Ruby: Earned 2,000,000 credits (2,105,945)Woodall LLR Ruby: Earned 2,000,000 credits (2,445,894)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,002,919)Generalized Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (17,626,102)PPS Sieve Emerald: Earned 50,000,000 credits (50,809,179)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,341,676)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,070,804)AP 26/27 Jade: Earned 10,000,000 credits (10,592,660)GFN Sapphire: Earned 20,000,000 credits (29,246,490)PSA Double Gold: Earned 500,000,000 credits (510,248,104)
Message 124651 - Posted: 10 Jan 2019 | 6:20:22 UTC - in response to Message 124648.

Excellent news!...in a sense. While I look forward to moving that bronze stain off my badge list and getting something brighter, I have one pre-AVX cpu left: A Xeon X5675. It's been relegated to sieving only (if there isn't an SGS/PPSE challenge) and I was going to finally retire the system (most of it still being the original i7-920 build from 2009) after GCW sieve ended, but now, I suppose it's gotten a stay of execution so long as we're using the old sieve program. Or is mtsieve going to make its debut here?

I don't see an mtsieve program that's appropriate. fbncsieve uses a fixed b, n and c value with variable k. fkbnsieve is fixed k, b n with variable c. None of the others are appropriate. Feel free to point out if I'm missing something there.

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Found 2 primes in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,008,573)Cullen LLR Turquoise: Earned 5,000,000 credits (5,005,909)ESP LLR Turquoise: Earned 5,000,000 credits (5,003,216)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,004,937)PPS LLR Ruby: Earned 2,000,000 credits (3,687,760)PSP LLR Ruby: Earned 2,000,000 credits (3,998,562)SoB LLR Turquoise: Earned 5,000,000 credits (8,360,883)SR5 LLR Ruby: Earned 2,000,000 credits (3,004,172)SGS LLR Ruby: Earned 2,000,000 credits (2,567,743)TRP LLR Ruby: Earned 2,000,000 credits (3,000,132)Woodall LLR Ruby: Earned 2,000,000 credits (3,007,050)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (268,250)Generalized Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (10,000,502)PPS Sieve Double Silver: Earned 200,000,000 credits (266,666,326)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,133)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,000,970)AP 26/27 Emerald: Earned 50,000,000 credits (97,480,773)GFN Emerald: Earned 50,000,000 credits (96,941,663)PSA Emerald: Earned 50,000,000 credits (90,000,001)
Message 124653 - Posted: 10 Jan 2019 | 6:58:22 UTC

Looking forward to it & can be patient another 2 months. I need doorstop food anyway.

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PPS LLR Bronze: Earned 10,000 credits (31,229)PSA Jade: Earned 10,000,000 credits (18,533,435)
Message 124669 - Posted: 10 Jan 2019 | 16:10:13 UTC - in response to Message 124651.

Excellent news!...in a sense. While I look forward to moving that bronze stain off my badge list and getting something brighter, I have one pre-AVX cpu left: A Xeon X5675. It's been relegated to sieving only (if there isn't an SGS/PPSE challenge) and I was going to finally retire the system (most of it still being the original i7-920 build from 2009) after GCW sieve ended, but now, I suppose it's gotten a stay of execution so long as we're using the old sieve program. Or is mtsieve going to make its debut here?

I don't see an mtsieve program that's appropriate. fbncsieve uses a fixed b, n and c value with variable k. fkbnsieve is fixed k, b n with variable c. None of the others are appropriate. Feel free to point out if I'm missing something there.


Correct, none of the programs built upon mtsieve support fixed k/variable n sieves, aka srsieve/sr1sieve/sr2sieve. Integrating srsieve into mtsieve will take a lot of work.

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Message 124673 - Posted: 10 Jan 2019 | 17:45:27 UTC - in response to Message 124669.

OK, I gotcha. I just remember reading about your new sieve program(s) awhile back and there seemed to be some optimism that we could "freshen" PG sieving with new speed/instruction support, etc.
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Message 124674 - Posted: 10 Jan 2019 | 18:09:35 UTC - in response to Message 124673.

OK, I gotcha. I just remember reading about your new sieve program(s) awhile back and there seemed to be some optimism that we could "freshen" PG sieving with new speed/instruction support, etc.


Both gcwsieve and mfsieve are built upon the mtsieve framework and should be faster than the previous versions.

I'm looking into the possibility of integrating srsieve/sr1sieve/sr2sieve into the framework.

It would be interesting if other developers used mtsieve as the framework for other forms to see if there is any improvement in speed, but none have shown interest.

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Message 124694 - Posted: 11 Jan 2019 | 14:17:17 UTC - in response to Message 124642.

Would anyone from the project care to comment on why the 321 sieve is being restarted?


321 is currently sieved up to n=25M. The current leading edge is n=14.6M. We're going to sieve 25M < n < 50M. That would bring the 321 sieve up to the same point to which we've sieved the conjecture projects. The sieving should take several years, and we'd like to get the sieving done before LLR reaches 25M. 321, having just a single k, and the smallest of all possible k's, could advance very quickly if people concentrated on it.

Additionally, with GCW sieve likely to be ending sometime this year, we did want to have another CPU sieve project to take its place. It's a good time, therefore. to reopen 321 sieving.


I´m sure you have thought about it, but once n>25M to n<=50M reaches the sievedepth that n<=25M were stopped at, then please include the currently unsearched n´s in the sieve file - it will save you quite a bit of WU on the n<=25M range and it won´t slowdown your sievespeed too much (if any at all).

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Message 124711 - Posted: 11 Jan 2019 | 21:17:52 UTC - in response to Message 124694.

I´m sure you have thought about it, but once n>25M to n<=50M reaches the sievedepth that n<=25M were stopped at, then please include the currently unsearched n´s in the sieve file - it will save you quite a bit of WU on the n<=25M range and it won´t slowdown your sievespeed too much (if any at all).

Yes, I did think of that and that's the plan. It will take slightly longer to sieve those and we'll probably have to adjust the credit rate upward. The way sieving is set up, we have control of the credit amount on every individual workunit. So when the sieve file gets n=16M-25M (16M is a guess) added to it, only those workunits using that new sieve will receive more credit.

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Message 124715 - Posted: 11 Jan 2019 | 22:39:05 UTC

wouldn't it make more sense to sieve this first?

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Message 124720 - Posted: 12 Jan 2019 | 2:46:47 UTC - in response to Message 124715.
Last modified: 12 Jan 2019 | 4:45:40 UTC

wouldn't it make more sense to sieve this first?

I have no idea what you mean. I was hoping not to have to explain this, but:

The 321 subproject tests candidates in the form k*b^n±1 where k=3 and b=2. In the past we sieved all candidates for n less than 25 million. Sieving kept going until an optimal level - that is it would take less time to test candidates with LLR than to keep sieving. When we sieve, there's a test divisor p which is tested against every candidate to see if p divides a candidate evenly. I'm assuming the letter p is used because it's always going to be a small (under 20 digits) prime.

We're about to start sieving n values from 25 million to 50 million. The starting p value will be 50T(50 x 1012). If any candidate is evenly divisible by any p, then it's by definition not a prime and that candidate is removed from the sieve. What KEP is saying is that we're going to sieve n=25M-50M only starting at p=50T. When we reach p=61P, which is where n=0-25M stopped, we should add the remaining part of the 0-25M sieve to the 25M-50M sieve file and so sieve part of that older range at relatively little cost. Until we reach p=61P, there's no reason to be sieving that 0-25M range - it was already done. Even if a few candidates were somehow missed, that's nothing compared to having millions of workunits search a space that's already been searched. When a factor is found, the corresponding candidate is completely removed from the sieve file. Sieving any n under 25M for any p under 61P has already been done. There's nothing there to find.

Because candidates with n=50M are so much larger than n=25M (remember, n is an exponent), we'll have to sieve to a much higher p level in any case. Adding those smaller n values back into the sieve makes a lot of sense. Because we'll be sieving a larger range (n=16M-50M for example) it'll take longer than for n=25M-50M and so I was commenting that at that point the credit given will rise by some amount. I don't know how much because I don't even have the n=25M-50M initial sieve file done yet. I'm currently sieving to p=50T on one of my computers. But since it's going to take at least a year to get to p=61P, I have lots of time to work it out.

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321 LLR Silver: Earned 100,000 credits (227,031)Cullen LLR Silver: Earned 100,000 credits (195,417)ESP LLR Silver: Earned 100,000 credits (198,861)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (167,291)PPS LLR Silver: Earned 100,000 credits (219,656)PSP LLR Silver: Earned 100,000 credits (121,070)SoB LLR Gold: Earned 500,000 credits (837,499)SR5 LLR Silver: Earned 100,000 credits (263,473)SGS LLR Silver: Earned 100,000 credits (190,547)TRP LLR Silver: Earned 100,000 credits (189,218)Woodall LLR Silver: Earned 100,000 credits (432,894)Generalized Cullen/Woodall Sieve Gold: Earned 500,000 credits (685,362)PPS Sieve Turquoise: Earned 5,000,000 credits (5,774,523)TRP Sieve (suspended) Bronze: Earned 10,000 credits (48,057)AP 26/27 Silver: Earned 100,000 credits (226,408)GFN Ruby: Earned 2,000,000 credits (2,692,670)PSA Sapphire: Earned 20,000,000 credits (20,003,871)
Message 124732 - Posted: 12 Jan 2019 | 9:37:39 UTC

oh sorry, i missunderstood the post before, thanks for the explanation

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