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Forum: Software 2022-06-29, 08:38
Replies: 77
Views: 6,652
Posted By ATH
If it is when mprime is running 22K exponents,...

If it is when mprime is running 22K exponents, then it is because at small exponents (small FFTs) the multithreading is not very efficient, so it is probably not using your entire CPU, unless you run...
Forum: Software 2018-12-07, 08:25
Replies: 77
Views: 6,652
Posted By ATH
It was "only" ~ 308 GB not terabytes, but still a...

It was "only" ~ 308 GB not terabytes, but still a lot compared to 14 GB:

GMP-ECM 7.0.5-dev [configured with GMP 6.1.2, --enable-asm-redc] [ECM]
Resuming ECM residue saved by ATH@5960X with...
Forum: Software 2018-12-06, 09:35
Replies: 77
Views: 6,652
Posted By ATH
It needs a lot of RAM with those high values...

It needs a lot of RAM with those high values maybe terabytes of RAM, so unless you use -maxmem 14000 or the -k option it will crash. If you start a stage 2 with the -v parameter and without -maxmem...
Forum: Software 2018-11-14, 12:18
Replies: 77
Views: 6,652
Posted By ATH
Only way to be 100% sure is if you find a factor...

Only way to be 100% sure is if you find a factor and the remaining co-factor is a PRP or a Prime.

But if you run all the curves for 25digit and 30digit level you can be "nearly 100%" sure there...
Forum: Software 2018-11-14, 06:28
Replies: 77
Views: 6,652
Posted By ATH
https://www.mersenne.org/report_ecm/ Those...

https://www.mersenne.org/report_ecm/

Those "optimal" values was calculated >20 years ago. They are calculated so after ~280 curves at B1=50,000 there are "only" 1/e ~ 37 % risk/chance of missing a...
Forum: Software 2018-11-11, 02:01
Replies: 77
Views: 6,652
Posted By ATH
I did not mean of for you to not enter B2 value...

I did not mean of for you to not enter B2 value in Prime95, it is not possible. I was just illustrating that the "standard" B2 in GMP-ECM is so high, and yes this algorithm will not work for higher...
Forum: Software 2018-11-10, 17:50
Replies: 77
Views: 6,652
Posted By ATH
B2=B1*100 is actually low. GMP-ECM chooses a much...

B2=B1*100 is actually low. GMP-ECM chooses a much higher B2 if you do not specify it yourself:

B1=11000, B2=1684420
B1=50000, B2=15446350
B1=250000, B2=183032866
B1=1000000, B2=974637522...
Showing results 1 to 7 of 7

 
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