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Old 2018-03-23, 02:27   #8
1976 Toyota Corona years forever!
petrw1's Avatar
Nov 2006
Saskatchewan, Canada

463810 Posts
Default Opinions or observations please...

As you may have noticed I am on a P-1 binge recently.
I have full time P-1 running on:
2 x 2-core PC's
6 x 4-core PC's

Some have as much as 16GB of RAM; a couple only 4G.
I have noticed over the past years of doing P-1 that more RAM makes a big difference in Phase 2.

Simple observations have shown that running 480 relative primes in batch of 10 takes noticeably longer than that same run in batches of 120 for example.

(I wouldn't be surprised if the following has been noted before and I missed it)...

So that got me to thinking that, especially for the PC's with 4GB or 8GB of RAM it should complete more total tests per week if I ran 2 workers of 2 cores each rather than 4 workers with 1 core each.
The phase 1 may be slightly slower but the phase 2 should be enough faster that it more than makes up for it; faster because with only 2 workers fighting for RAM they each will get a lot more and can process more relative primes.

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