Thread: P-1 memory
View Single Post
Old 2018-05-14, 08:00   #1
ET_
Banned
 
ET_'s Avatar
 
"Luigi"
Aug 2002
Team Italia

10010101000002 Posts
Default P-1 memory

I am testing an Imac with 32 GB of RAM, a 4-cores IvyBridge and Windows 10 installed.

I gave 8GB of RAM to mprime to run P-1 work on M87,656,xxx: mprime takes 8GB of RAM and starts stage 2 with E=6 (I suppose it's a selection of Brent-Sujama extensions). Stage 2 runs in one single pass of 192 relative primes.

Giving more RAM (say 12/24GB) to P-1 would end up in:
a) A quicker stage 2?
b) A slower stage 2 with a better chance to find factors?

I suppose b) is the correct answer, but to be sure I'm asking here.

I also assume the same for ECM (especially for fat Fermat numbers).
ET_ is offline   Reply With Quote