mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.36 seconds.
Search: Posts Made By: akruppa
Forum: GPU Computing 2013-03-11, 18:30
Replies: 3,292
Views: 273,767
Posted By akruppa
Btw, what is the relationship between mfaktc and...

Btw, what is the relationship between mfaktc and mmff? I haven't kept up with developments, and digging through a 100-page thread seems a daunting task... is one a superset of the other?
Forum: Lounge 2013-03-11, 10:20
Replies: 103
Views: 7,934
Posted By akruppa
129. Notice how it was warmer today than...

129. Notice how it was warmer today than yesterday? That was Curtis Cooper.
Forum: GPU Computing 2013-03-11, 10:18
Replies: 3,292
Views: 273,767
Posted By akruppa
I'm not familiar with the mfaktc code at all, or...

I'm not familiar with the mfaktc code at all, or I could probably make the changes myself. If the changes to allow composite exponents are implemented, maybe I can add some code to skip useless...
Forum: GPU Computing 2013-03-10, 11:57
Replies: 3,292
Views: 273,767
Posted By akruppa
Correct, this is of no value to GIMPS as a prime...

Correct, this is of no value to GIMPS as a prime search project. Some people, including me, sometimes do look for factors of large 2^n-1 numbers, and it would be awesome to be able to use GPUs for...
Forum: GPU Computing 2013-03-09, 16:10
Replies: 3,292
Views: 273,767
Posted By akruppa
I guess we can limit ourselves to primitive...

I guess we can limit ourselves to primitive divisors; divisors of algebraic factors may or may not be found but we can leave those for the user to figure out. For a primitive divisor p of 2^n-1, we...
Forum: GPU Computing 2013-03-09, 14:50
Replies: 3,292
Views: 273,767
Posted By akruppa
Btw, is there a particular reason for disallowing...

Btw, is there a particular reason for disallowing composite exponents?
Forum: GMP-ECM 2013-03-08, 15:39
Replies: 69
Views: 9,625
Posted By akruppa
RichD, can you try compiling the asm code...

RichD,

can you try compiling the asm code with a newer version of gcc than 4.2? It works on, e.g., gcc110.fsffrance.org with 4.7.2.
The speed regression may be due to not using the asm mulredc;...
Forum: Science & Technology 2013-03-07, 18:28
Replies: 117
Views: 11,650
Posted By akruppa
All we need is a way to make the sun go nova and...

All we need is a way to make the sun go nova and you'll have all three.
Forum: Lounge 2013-03-05, 09:57
Replies: 1,585
Views: 76,393
Posted By akruppa
Doesn't "download manager" = "spyware" that you...

Doesn't "download manager" = "spyware" that you would please install for them? Or that's what I heard... :unsure:
Forum: Lounge 2013-03-01, 22:22
Replies: 15
Views: 1,677
Posted By akruppa
The posting is complete gobbledygook, but pasting...

The posting is complete gobbledygook, but pasting pieces of the sentences into Google finds only this thread - it does not seem to be the work of an automatic spambot. It's hardly a consolation to...
Forum: Operazione Doppi Mersennes 2013-03-01, 21:46
Replies: 611
Sticky: Results
Views: 41,852
Posted By akruppa
no factor for k*2^35+1 in k range: 90P to 100P...

no factor for k*2^35+1 in k range: 90P to 100P (92-bit factors) [mmff 0.26 mfaktc_barrett96_F32_63gs]
Forum: Data 2013-03-01, 17:48
Replies: 25
Views: 2,437
Posted By akruppa
I've been wondering about that... current Mp...

I've been wondering about that... current Mp candidates have residues of about 4-8MB each, so on a contemporary system, you could fit on the order of 2^10 residues. That would be enough to make a...
Forum: Computer Science & Computational Number Theory 2013-03-01, 17:26
Replies: 36
Views: 3,022
Posted By akruppa
This is in fact a particular case of the...

This is in fact a particular case of the Frobenius test, explained in Crandall and Pomerance, among others. You are working in Fp[x]/(x^2+1) which is a proper quadratic extension for a prime p ≡ 3...
Forum: GMP-ECM 2013-03-01, 15:52
Replies: 4
Views: 795
Posted By akruppa
It uses getrusage() to get cpu time, which...

It uses getrusage() to get cpu time, which theoretically counts only the time the program actually executes and should not be affected (much) by the process being suspended to let other processes...
Forum: GMP-ECM 2013-03-01, 12:52
Replies: 4
Views: 795
Posted By akruppa
No, this assertion is from the Schönhage-Strassen...

No, this assertion is from the Schönhage-Strassen code that we use with Kronecker-Schönhage polynomial multiplication alternatively to the NTT. I don't think we've seen this bug before.

The code...
Forum: Operazione Doppi Mersennes 2013-03-01, 09:56
Replies: 484
Sticky: Reservations
Views: 30,398
Posted By akruppa
FermatFactor=35,100e15,110e15

FermatFactor=35,100e15,110e15
Forum: GMP-ECM 2013-03-01, 09:49
Replies: 43
Views: 3,514
Posted By akruppa
Glad to hear it works! I guess we should print...

Glad to hear it works! I guess we should print the suggestion of trying --with-gmp= along with the GMP version mismatch error message. That error happens very frequently since most distros come with...
Forum: GMP-ECM 2013-03-01, 00:14
Replies: 43
Views: 3,514
Posted By akruppa
What happens if you use "./configure...

What happens if you use "./configure --with-gmp=/usr/local/" instead of supplying the LIBS variable directly?
Forum: GMP-ECM 2013-02-27, 15:30
Replies: 12
Views: 8,155
Posted By akruppa
Version 6.4.4 is now available from...

Version 6.4.4 is now available from https://gforge.inria.fr/projects/ecm/

Changes between GMP-ECM 6.4.3 and GMP-ECM 6.4.4:
* Fixed PowerPC64 assembly code with --enable-shared (thanks Leif...
Forum: Programming 2013-02-26, 11:52
Replies: 22
Views: 2,593
Posted By akruppa
Currently the test builds link against the GMP...

Currently the test builds link against the GMP library provided by MinGW, although a separately compiled GMP should work just as well. We tested only MinGW32 so far, not MinGW64, so right now that...
Forum: Factoring 2013-02-22, 20:26
Replies: 69
Views: 4,921
Posted By akruppa
This is work in progress.

This is work in progress.
Forum: Factoring 2013-02-22, 18:19
Replies: 69
Views: 4,921
Posted By akruppa
It was a bit faster when I visited EPFL a few...

It was a bit faster when I visited EPFL a few years ago. However, I have not worked on that code since, while Thorsten probably worked on his, and I have no idea how they compare with newer lasieve...
Forum: GMP-ECM 2013-02-19, 18:58
Replies: 43
Views: 3,514
Posted By akruppa
I have just updated the tarball again. The new...

I have just updated the tarball again. The new tarball includes a patch for PowerPC64 assembly code (under powerpc64/) when a dynamic libaray is built. No other code was changed.
Forum: GMP-ECM 2013-02-19, 16:31
Replies: 43
Views: 3,514
Posted By akruppa
A release candidate for 6.4.4 is available at...

A release candidate for 6.4.4 is available at http://www.loria.fr/~kruppaal/ecm-6.4.4.tar.gz
If you like, please give it a try and report success or failure. Thanks!
Forum: GMP-ECM 2013-02-18, 16:33
Replies: 43
Views: 3,514
Posted By akruppa
The bug is due to GMP 5.1.x using a different...

The bug is due to GMP 5.1.x using a different semantic for __gmp_redc_{12}() functions than GMP 5.0.x and MPIR did, and GMP-ECM 6.4.{0123} expects the old kind. A GMP-ECM 6.4.4 release is currently...
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 06:32.

Sun Aug 9 06:32:51 UTC 2020 up 23 days, 2:19, 1 user, load averages: 1.65, 1.95, 2.05

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.