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Message boards :
Proth Prime Search :
100+ hour WU?
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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? | |
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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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John Honorary cruncher
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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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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)? | |
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JohnHonorary cruncher
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Joined: 21 Feb 06
Posts: 2875
ID: 2449
Credit: 2,681,934
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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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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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92*10^1439761-1 REPDIGIT PRIME :) :) :)
314187728^131072+1 GENERALIZED FERMAT
31*332^367560+1 CRUS PRIME
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100+ hour WU? |
