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Old 2019-10-29, 02:04   #9
VBCurtis
 
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"Curtis"
Feb 2005
Riverside, CA

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Quote:
Originally Posted by PhilF View Post

So where to find some suitable candidates for GPU based ECM curves?

I would like to compare the relative speed of a GPU-enabled GMP-ECM stage 1 with a CPU-based Prime95 stage 1.
GPU-ECM is limited to 1019 bits. Prime95 is limited to numbers of a certain form. There's not a ton of overlap between them, but I happen to be working on factorizations of k*2^n-1 (Riesel form).
My next two SNFS jobs are:
Code:
#expr(13*2^881-1)
466877517878596827431051486024691686855414677675172874855133940880576871475985818271788497478759019442908250077983766404430012687428346626398685854186379459430598338289874292283833496457445239
#expr(13*2^892-1)
18506805396968135611155184891404406020831889021055758328923431924399638720432241766053234118351869077918037177534464815730861966812520562472496745230825092848732924799837750268894252467544668175171
I believe these can be run by both programs. They've each had about 2t50 done already, and need something close to t55; so curves at 11e7 or bigger are helpful to my efforts.
If you're curious, you can find project status at mklasson.com/factors
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