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-   -   ECM Efforts (https://www.mersenneforum.org/showthread.php?t=3998)

akruppa 2005-04-14 19:11

Not with Prime95 version 24. It now support 2^k and 3*2^k FFT lengths on both SSE2 and non-SSE2 machines for 2^n+1 numbers. So it is much better to work only on 2^791+1 now.

Alex

Xyzzy 2005-04-14 19:46

I'm using GMP-ECM... It takes 3.5 minutes per curve...

akruppa 2005-04-14 19:51

Which cpu type are you using?

flava 2005-04-14 22:05

I'll give a try to 2,951+

Xyzzy 2005-04-15 00:13

[QUOTE=akruppa]Which cpu type are you using?[/QUOTE]A 2.4GHz AMD64...

geoff 2005-04-15 04:00

I will do some work on 2,1342L together with 2,1342M (working on 2^1342+1 should make good use of Prime95's length 64 FFT), but I will do 50 digit curves because 2,1342M has already been tested to 45 digits.

flava 2005-04-19 11:08

Done 1000 curves (45 digit) for 2,951+
I'll do at least 1000 more.

MrHappy 2005-04-19 16:14

600 curves done for 969. Reported nowhere but here.

[edit: typo corrected]

Xyzzy 2005-04-22 23:15

1 Attachment(s)
For 2,791+

3184 curves using B1=11e6 & B2=25577181640...

akruppa 2005-04-23 02:49

The required number of curves I posted above was for B2=100*B1; when using the GMP-ECM default B2, the numbers are lower. In terms of fractions, the required work is now

P791: 0.07 (319 GMP-ECM curves or 736 with Prime95)
P951: 0.98 (4512 or 10420)
P969: 0.41 (1887 or 4357)
P993: 0.98 (4512 or 10420)

Alex

Xyzzy 2005-04-23 13:03

[QUOTE=akruppa]P791: 0.07 (319 GMP-ECM curves or 736 with Prime95)[/QUOTE]I'll finish this up if nobody else is working on it...


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