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Message boards : Proth Prime Search : 100+ hour WU?

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TheLQ
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SGS LLR Silver: Earned 100,000 credits (245,352)
Message 41319 - Posted: 4 Oct 2011 | 13:08:27 UTC

I'm a little new to PrimeGrid and to BOINC in general, so please forgive the noobness.

When I got my first WU I saw that the estimated time remaining was over 100 hours on an i5-2520M processor. Since I don't have BOINC running all the time (probably get in 12 hours a day), is PrimeGrid not a good project for a laptop or is this just an abnormally large WU?

Profile Rick Reynolds
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Discovered 3 mega primesFound 2 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de PrimesFound 12 primes in the 2020 Tour de PrimesFound 2 primes in the 2021 Tour de PrimesFound 1 mega prime in the 2021 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (10,244,909)Cullen LLR Jade: Earned 10,000,000 credits (10,194,451)ESP LLR Turquoise: Earned 5,000,000 credits (5,174,327)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,377,425)PPS LLR Emerald: Earned 50,000,000 credits (73,178,392)PSP LLR Turquoise: Earned 5,000,000 credits (5,151,448)SoB LLR Jade: Earned 10,000,000 credits (10,045,557)SR5 LLR Jade: Earned 10,000,000 credits (14,871,275)SGS LLR Turquoise: Earned 5,000,000 credits (7,860,522)TRP LLR Jade: Earned 10,000,000 credits (11,130,742)Woodall LLR Turquoise: Earned 5,000,000 credits (5,419,909)321 Sieve (suspended) Double Bronze: Earned 100,000,000 credits (101,538,236)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,984,158)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,840,173,136)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Silver: Earned 200,000,000 credits (276,723,135)WW Double Amethyst: Earned 1,000,000,000 credits (1,043,236,000)GFN Double Silver: Earned 200,000,000 credits (349,277,565)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 41322 - Posted: 4 Oct 2011 | 13:16:44 UTC - in response to Message 41319.

I'm a little new to PrimeGrid and to BOINC in general, so please forgive the noobness.

When I got my first WU I saw that the estimated time remaining was over 100 hours on an i5-2520M processor. Since I don't have BOINC running all the time (probably get in 12 hours a day), is PrimeGrid not a good project for a laptop or is this just an abnormally large WU?


You got a pps sieve wu and yes that will be a very long task even for an i5. If you can only run 12 hours a day I might suggest that you run the pps llr or the sg llr projects as those wu's take much less time to complete.

Also, any sieve project on primegrid will not return primes. They do return factors. All LLR projects have a chance of returning a prime.

On the off chance you get a gpu (nvidia preferably) then running either the pps sieve or the cw sieve on the gpu will take much less time than on your cpu (given the gpu card of course). I would hazard a guess that on primegrid 99.4% of all pps and cw sieves are now run on a gpu card.

Hope this makes sense - Rick
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321 LLR Bronze: Earned 10,000 credits (11,773)Cullen LLR Bronze: Earned 10,000 credits (14,945)ESP LLR Bronze: Earned 10,000 credits (26,855)PPS LLR Bronze: Earned 10,000 credits (84,876)PSP LLR Bronze: Earned 10,000 credits (15,311)SoB LLR Bronze: Earned 10,000 credits (21,440)SR5 LLR Bronze: Earned 10,000 credits (29,270)SGS LLR Bronze: Earned 10,000 credits (26,616)TPS LLR (retired) Bronze: Earned 10,000 credits (36,288)TRP LLR Bronze: Earned 10,000 credits (41,655)Woodall LLR Bronze: Earned 10,000 credits (15,807)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,014)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (23,405)PPS Sieve Bronze: Earned 10,000 credits (36,192)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,306)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,738)GFN Bronze: Earned 10,000 credits (86,217)PSA Ruby: Earned 2,000,000 credits (2,143,756)
Message 41325 - Posted: 4 Oct 2011 | 13:39:13 UTC - in response to Message 41319.

I'm a little new to PrimeGrid and to BOINC in general, so please forgive the noobness.

When I got my first WU I saw that the estimated time remaining was over 100 hours on an i5-2520M processor. Since I don't have BOINC running all the time (probably get in 12 hours a day), is PrimeGrid not a good project for a laptop or is this just an abnormally large WU?

A PPS (Sieve) will not take 100 hours even on a CPU. However, Rick is correct in that the PPS (Sieve) and CW (Sieve) are best processed on a GPU. Let the PPS (Sieve) task crunch for a while and you should notice the time estimate falling.

Short CPU projects are PPS (LLR) and SGS (LLR). Longer projects for the CPU are TRP (LLR) and TRP (Sieve), average CPU time: 16 hours and 4 hours respectively. The longest CPU projects are 321 (LLR), Cullen (LLR), PSP (LLR), SoB (LLR), and Woodall (LLR) which take from 1 day to 10+ days.
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Message 41326 - Posted: 4 Oct 2011 | 14:08:24 UTC

I went ahead and aborted the PPS Seive WU since it estimated 55 hours while I only had 50 till it expired. Took me a bit to find it, but now I'm only in the SG LLR project.

On a semi-related question, even with the shorter SG LLR project, would you recommend it or any longer LLR project for dedicated Linux Pentium 4 boxes (No GPU since all of mine are too old)?

JohnProject donor
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321 LLR Bronze: Earned 10,000 credits (11,773)Cullen LLR Bronze: Earned 10,000 credits (14,945)ESP LLR Bronze: Earned 10,000 credits (26,855)PPS LLR Bronze: Earned 10,000 credits (84,876)PSP LLR Bronze: Earned 10,000 credits (15,311)SoB LLR Bronze: Earned 10,000 credits (21,440)SR5 LLR Bronze: Earned 10,000 credits (29,270)SGS LLR Bronze: Earned 10,000 credits (26,616)TPS LLR (retired) Bronze: Earned 10,000 credits (36,288)TRP LLR Bronze: Earned 10,000 credits (41,655)Woodall LLR Bronze: Earned 10,000 credits (15,807)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,014)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (23,405)PPS Sieve Bronze: Earned 10,000 credits (36,192)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,306)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,738)GFN Bronze: Earned 10,000 credits (86,217)PSA Ruby: Earned 2,000,000 credits (2,143,756)
Message 41328 - Posted: 4 Oct 2011 | 14:35:28 UTC - in response to Message 41326.

I went ahead and aborted the PPS Seive WU since it estimated 55 hours while I only had 50 till it expired. Took me a bit to find it, but now I'm only in the SG LLR project.

On a semi-related question, even with the shorter SG LLR project, would you recommend it or any longer LLR project for dedicated Linux Pentium 4 boxes (No GPU since all of mine are too old)?

Before jumping to longer projects, let it run a few days on PPS (LLR) and/or SGS (LLR). Then you could go to TRP (LLR) and see how long those tasks take. 321 (LLR) would be next. After that, Cullen (LLR), Woodall (LLR), PSP (LLR), and SoB (LLR) take substantially longer.

As for time estimates, you'll need to run a few tasks for that specific project to allow BOINC to make a better prediction for your host.
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Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de PrimesFound 1 prime in the 2021 Tour de Primes321 LLR Silver: Earned 100,000 credits (229,492)Cullen LLR Silver: Earned 100,000 credits (110,733)PPS LLR Jade: Earned 10,000,000 credits (11,335,374)PSP LLR Silver: Earned 100,000 credits (104,385)SoB LLR Silver: Earned 100,000 credits (106,117)SR5 LLR Silver: Earned 100,000 credits (139,802)SGS LLR Amethyst: Earned 1,000,000 credits (1,325,207)TRP LLR Gold: Earned 500,000 credits (626,755)Woodall LLR Silver: Earned 100,000 credits (122,944)321 Sieve (suspended) Silver: Earned 100,000 credits (104,900)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,599)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (515,556)PPS Sieve Jade: Earned 10,000,000 credits (11,855,975)TRP Sieve (suspended) Silver: Earned 100,000 credits (255,612)AP 26/27 Ruby: Earned 2,000,000 credits (2,583,960)WW Amethyst: Earned 1,000,000 credits (1,088,000)GFN Sapphire: Earned 20,000,000 credits (23,334,026)PSA Turquoise: Earned 5,000,000 credits (7,522,050)
Message 41346 - Posted: 4 Oct 2011 | 20:22:32 UTC - in response to Message 41326.

I went ahead and aborted the PPS Seive WU since it estimated 55 hours while I only had 50 till it expired. Took me a bit to find it, but now I'm only in the SG LLR project.

On a semi-related question, even with the shorter SG LLR project, would you recommend it or any longer LLR project for dedicated Linux Pentium 4 boxes (No GPU since all of mine are too old)?


Start with Sophie Germain Prime Search (LLR): average crunch time per WU is only 16 minutes ( on any modern CPU)
So I think that will be good start point. And yes, you can find prime if you are lucky :)
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Message boards : Proth Prime Search : 100+ hour WU?

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