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Message boards : Sieving : setting B to something higher than 13

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Werinbert
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Joined: 9 Jun 13
Posts: 92
ID: 233452
Credit: 168,856,664
RAC: 201,235
321 LLR Gold: Earned 500,000 credits (533,081)Cullen LLR Gold: Earned 500,000 credits (529,186)ESP LLR Gold: Earned 500,000 credits (513,315)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (521,209)PPS LLR Turquoise: Earned 5,000,000 credits (6,377,690)PSP LLR Gold: Earned 500,000 credits (566,492)SoB LLR Gold: Earned 500,000 credits (597,244)SR5 LLR Gold: Earned 500,000 credits (609,158)SGS LLR Gold: Earned 500,000 credits (503,589)TRP LLR Gold: Earned 500,000 credits (542,295)Woodall LLR Gold: Earned 500,000 credits (615,831)321 Sieve Turquoise: Earned 5,000,000 credits (8,069,388)Generalized Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,101,470)PPS Sieve Double Bronze: Earned 100,000,000 credits (100,344,557)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (715,073)TRP Sieve (suspended) Gold: Earned 500,000 credits (630,833)AP 26/27 Jade: Earned 10,000,000 credits (10,079,199)GFN Sapphire: Earned 20,000,000 credits (33,746,154)PSA Ruby: Earned 2,000,000 credits (2,262,901)
Message 137357 - Posted: 7 Feb 2020 | 1:38:21 UTC

I am sieving on a 1660 Ti with a B set to 13. It is not slowing down any concurrent activity such as web browsing or working in Excel. So I am wondering would it be worthwhile for me to push it up a notch or two? (I can test it, but I don't want to do anything that others have already found to screw up stability.)

Also when starting the sieve it says it is using a 79 bit core. Any idea what that means?
____________
Werinbert is not prime... or PRPnet keeps telling me so.
Badge score: 2x2 + 10x3 + 2x4 + 3x5 + 1x8 + 1x9 = 74

Profile RussEfarmer
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Joined: 2 Aug 19
Posts: 8
ID: 1166081
Credit: 59,392,629
RAC: 233,008
Found 1 prime in the 2020 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,138,595)Cullen LLR Gold: Earned 500,000 credits (868,473)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (51,000)PPS LLR Ruby: Earned 2,000,000 credits (3,641,543)PSP LLR Ruby: Earned 2,000,000 credits (2,082,530)SoB LLR Ruby: Earned 2,000,000 credits (2,268,076)SR5 LLR Gold: Earned 500,000 credits (593,652)SGS LLR Amethyst: Earned 1,000,000 credits (1,781,102)TRP LLR Ruby: Earned 2,000,000 credits (2,820,731)321 Sieve Turquoise: Earned 5,000,000 credits (6,451,973)PPS Sieve Turquoise: Earned 5,000,000 credits (8,360,080)AP 26/27 Turquoise: Earned 5,000,000 credits (5,069,922)GFN Turquoise: Earned 5,000,000 credits (6,917,110)PSA Jade: Earned 10,000,000 credits (16,358,396)
Message 137367 - Posted: 7 Feb 2020 | 4:54:59 UTC - in response to Message 137357.

I have no idea about this, I would say your best bet is to reserve some small ranges and play around with it in the downtime :)

Also, while Googling a bit, I found a neat bit reading, maybe some folks can get something out of this (because I sure can't :S)
http://users.wfu.edu/choss/CUDA/docs/Lecture%205.pdf

stream
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Joined: 1 Mar 14
Posts: 746
ID: 301928
Credit: 478,708,955
RAC: 66,759
Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,011,570)Cullen LLR Jade: Earned 10,000,000 credits (10,009,374)ESP LLR Jade: Earned 10,000,000 credits (10,009,221)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,012,217)PPS LLR Jade: Earned 10,000,000 credits (11,055,307)PSP LLR Jade: Earned 10,000,000 credits (10,044,081)SoB LLR Turquoise: Earned 5,000,000 credits (7,354,440)SR5 LLR Turquoise: Earned 5,000,000 credits (9,904,596)SGS LLR Turquoise: Earned 5,000,000 credits (6,422,646)TRP LLR Turquoise: Earned 5,000,000 credits (9,911,706)Woodall LLR Turquoise: Earned 5,000,000 credits (9,943,488)321 Sieve Sapphire: Earned 20,000,000 credits (20,004,228)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,047,667)PPS Sieve Sapphire: Earned 20,000,000 credits (20,866,490)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,043,271)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,015,177)AP 26/27 Sapphire: Earned 20,000,000 credits (20,045,194)GFN Emerald: Earned 50,000,000 credits (52,707,839)PSA Double Silver: Earned 200,000,000 credits (200,301,443)
Message 137371 - Posted: 7 Feb 2020 | 6:11:01 UTC - in response to Message 137357.

I am sieving on a 1660 Ti with a B set to 13. It is not slowing down any concurrent activity such as web browsing or working in Excel. So I am wondering would it be worthwhile for me to push it up a notch or two? (I can test it, but I don't want to do anything that others have already found to screw up stability.)

It's locked to 13 in the source code. This parameter determines size of GPU buffers and some other stuff which many (or even all) of us do not understand. Probably there is some reason why it cannot go above 13. Anyway, you can download source code and play with it (comparing output with known ranges).

Also when starting the sieve it says it is using a 79 bit core. Any idea what that means?

Depending on range tested, all calculations could be done with 63-, 64-, and 79-bit precision, there are three separate "cores". The latter is slowest.

Werinbert
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Joined: 9 Jun 13
Posts: 92
ID: 233452
Credit: 168,856,664
RAC: 201,235
321 LLR Gold: Earned 500,000 credits (533,081)Cullen LLR Gold: Earned 500,000 credits (529,186)ESP LLR Gold: Earned 500,000 credits (513,315)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (521,209)PPS LLR Turquoise: Earned 5,000,000 credits (6,377,690)PSP LLR Gold: Earned 500,000 credits (566,492)SoB LLR Gold: Earned 500,000 credits (597,244)SR5 LLR Gold: Earned 500,000 credits (609,158)SGS LLR Gold: Earned 500,000 credits (503,589)TRP LLR Gold: Earned 500,000 credits (542,295)Woodall LLR Gold: Earned 500,000 credits (615,831)321 Sieve Turquoise: Earned 5,000,000 credits (8,069,388)Generalized Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,101,470)PPS Sieve Double Bronze: Earned 100,000,000 credits (100,344,557)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (715,073)TRP Sieve (suspended) Gold: Earned 500,000 credits (630,833)AP 26/27 Jade: Earned 10,000,000 credits (10,079,199)GFN Sapphire: Earned 20,000,000 credits (33,746,154)PSA Ruby: Earned 2,000,000 credits (2,262,901)
Message 137393 - Posted: 7 Feb 2020 | 12:04:11 UTC

Thank you for the info.
____________
Werinbert is not prime... or PRPnet keeps telling me so.
Badge score: 2x2 + 10x3 + 2x4 + 3x5 + 1x8 + 1x9 = 74

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Message boards : Sieving : setting B to something higher than 13

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