mersenne.ca - Page 56

James Heinrich · 2021-04-22, 21:22

Quote:

Originally Posted by Dylan14

Will the factoring beyond first factor page be updated to have lines for Pplus1 work?

I can easily add in the worktodo lines, but I'm uncertain how to pick appropriate bounds. For those that have been following this more closely please offer guidance. Right now I'm just copying the Pminus1 bounds.

Dylan14 · 2021-04-22, 21:39

Quote:

Originally Posted by James Heinrich

I can easily add in the worktodo lines, but I'm uncertain how to pick appropriate bounds.

From what I have read: It appears the B1 bound should be chosen so that the B1 for P+1 is much greater than the B1 used for ECM assignments (not exactly sure what is the best choice. Of course, with higher B1 bigger factors could be found.). B2 is either given by the user (if bit level is not specified) or given by the same determination as for P-1 if the bit level is given.

nordi · 2021-04-22, 22:20

Regarding the B1/B2 choice, available RAM is currently the limit for me. I chose B1 as 40 times the B1 of the current ECM work and B2 = 50 * B1. In stage 2, that uses 2GB for already factored exponents around 95k (B1=40M, B2=2000M) and 4GB for already factored exponents around 295k (B1=10M, B2=500M). So e.g. a quad core with 16GB RAM can't go higher than that without running into problems. I actually had to make sure that not all curves go to stage 2 at the same time, or my computer would also run out of memory.

James Heinrich · 2021-04-23, 03:32

Once again there's a known issue with the nightly data sync (most likely related to P+1 results), waiting for Aaron to fix whatever the problem is before I can run the import.

edit: import complete.

nordi · 2021-04-23, 13:17

@James: Maybe you are just doing some testing right now, but https://www.mersenne.ca/exponent/287873 shows some debug info that probably should not be there.

James Heinrich · 2021-04-23, 17:07

Quote:

Originally Posted by nordi

@James: Maybe you are just doing some testing right now, but https://www.mersenne.ca/exponent/287873 shows some debug info that probably should not be there.

Nope, I just forgot to remove the debug lines before uploading to the live server.

Thanks.

2021-04-23, 03:32	#609
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 110100001110₂ Posts	Once again there's a known issue with the nightly data sync (most likely related to P+1 results), waiting for Aaron to fix whatever the problem is before I can run the import. edit: import complete. Last fiddled with by James Heinrich on 2021-04-23 at 04:46

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2021-04-22, 22:20	#608
nordi Dec 2016 41₁₆ Posts	Regarding the B1/B2 choice, available RAM is currently the limit for me. I chose B1 as 40 times the B1 of the current ECM work and B2 = 50 * B1. In stage 2, that uses 2GB for already factored exponents around 95k (B1=40M, B2=2000M) and 4GB for already factored exponents around 295k (B1=10M, B2=500M). So e.g. a quad core with 16GB RAM can't go higher than that without running into problems. I actually had to make sure that not all curves go to stage 2 at the same time, or my computer would also run out of memory.

2021-04-23, 13:17	#610
nordi Dec 2016 1000001₂ Posts	@James: Maybe you are just doing some testing right now, but https://www.mersenne.ca/exponent/287873 shows some debug info that probably should not be there.