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Old 2008-11-02, 07:41   #1
lidocorc
 
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Default Memory usage during P-1 factoring

Is p95 faster if I give it more memory during stage 2 of P-1 factoring? The workers window shows: The more memory, the more relative primes are being processed at a time. (Now it's 70 relative primes while p95 is using 1509 MB) The question is: Does it make sense to give p95 that much memory -- at least during P-1 stage 2?

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Old 2008-11-02, 16:36   #2
starrynte
 
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When I multiplied mem usage by just more than two, performance nearly doubled...so yes, more memory in stage 2 = faster
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Old 2008-11-03, 02:35   #3
Uncwilly
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Quote:
Originally Posted by starrynte View Post
When I multiplied mem usage by just more than two, performance nearly doubled...so yes, more memory in stage 2 = faster
No, it is slightly slower, but better overall for GIMPS. The chance of finding a factor goes up, by a bigger amount than the the little bit it slows down.

A little slower, but better for you too, as you are more likely get a factor.
Every number that has a factor found says days, weeks, and in some cases years of LL testing.
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