Is there the chance to factor a 232 digits number with MSIEVE and GGNFS? Is it better to use a powerful CPU such as Intel i980x or CUDA GPUs? Many thanks....
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Luigi Morelli
et_cygni_61
Apr 17, 2010 3:38 pm
... GPUs are actually only used in the polynomial selection on msieve. Luigi...
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chris2be8
Apr 17, 2010 4:02 pm
... 232 digits is a worthy challenge for SNFS, about 6-7000 CPU hours. 232 digit GNFS is *much* harder. See http://mersenneforum.org/showthread.php?t=12958 for...
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jasonp@...
Apr 17, 2010 6:33 pm
... The short answer is that we can choose polynomials and do the sieving with a great deal of effort using publicly available tools, but the postprocessing...
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Guirgis Sameh
guirgis.sameh
Apr 19, 2010 5:35 pm
Hello I successed to run factMsieve for 100, 110, 120, 130, 140 digits as the main  part of my graduation project . For 155 digit (I skipped 150 digit), I...
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chris2be8
Apr 20, 2010 6:16 pm
... Are the runs you have done SNFS or GNFS (or a mixture)? Assuming they are all the same type you should be able to estimate run time, it will increase by...
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thomas_ruley
Apr 24, 2010 2:08 pm
I got the following error message when running the example number as per Jeff Gilchrist's instructions: C:\GGNFS>factmsieve.py example ->...
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Guirgis Sameh
guirgis.sameh
Apr 30, 2010 1:03 pm
Hello  I got the following error message when I factor 155 digit : "matrix needs more columns than rows; try adding 2-3Invalid argumentore relations" I...
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Torbjörn
torbjornalm
Apr 30, 2010 1:15 pm
It is interesting to note how NFS has evolved compared to other factoring methods. In Sept 1997, Peter Montgomery had a little contest, the task was to guess...
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batalovs
Apr 30, 2010 7:18 pm
... With the right parameters, the time estimate rule is easy to remember: - for each 9 digits snfs difficulty, snfs time will double - for each 5 digits gnfs...
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batalovs
Apr 30, 2010 7:27 pm
... There's something broken in the message (who compiled it? or is it the script?), but it should have said this: "matrix needs more columns than rows; try...
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jasonp@...
May 1, 2010 12:36 am
... In late 1997 the most common machine on everyone's desk was a 200MHz Pentium with 32MB of memory; today's factoring programs could never even run on such a...
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David Willmore
davidwillmore
May 2, 2010 3:21 am
... Dude, just take the compliment. :) Cheers, David...
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jasonp@...
May 2, 2010 3:40 am
... You're welcome :) jasonp ... This message was sent using BOO.net's Webmail. http://www.boo.net/...
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Guirgis Sameh
guirgis.sameh
May 3, 2010 8:13 am
Thanks, but is it neceaasry to remove the files .lp, and  .mat (keep .dat) and how to sieve another 2-3 million relations since running facMsieve will go to...
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br_gladman
May 24, 2010 9:38 am
This is to let anyone using GGNFS on Windows know that I have added build files for Visual Studio 2010 to the GGNFS SourceForge repository. Please note that...
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Guirgis Sameh
guirgis.sameh
Jul 17, 2010 1:45 pm
 I have a confusion in  the sieving step in GGNFS. which sieve is used: line or lattice? The GGNFS uses lattice sieve while Msieve uses line sieve. any help...
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die_beiden2001
Jul 17, 2010 1:47 pm
Hi can someone sned his running GGNF zipped (windows) version? i made the config 100% only errors :(...
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Jeff Gilchrist
jeff.gilchrist
Jul 17, 2010 4:53 pm
... The line siever is msieve is *MUCH* slower than the lattice siever in GGNFS. Use the one in GGNFS. There is a python script that helps automate things for...
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Jeff Gilchrist
jeff.gilchrist
Jul 17, 2010 4:54 pm
... You can find pre-compiled Windows binaries here: http://gilchrist.ca/jeff/factoring/index.html Instructions on how to run them are here: ...
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petequek
Jul 19, 2010 10:10 am
Hi, I'm new to the group, and faced problems during the sieving stage. With the help of the very useful instructions in...
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jasonp@...
Jul 19, 2010 11:04 am
... The tarball that you downloaded has been obsolete for years; to build the sievers you need to grab the latest SVN of GGNFS and build manually. jasonp ... ...
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petequek
Jul 20, 2010 7:25 am
I repeated the building of ggnfs using the latest trunk, which I downloaded using the command: svn co https://ggnfs.svn.sourceforge.net/svnroot/ggnfs ggnfs And...
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chris2be8
Jul 20, 2010 6:27 pm
... What compiler are you using? If gcc use "gcc -v" to check what version you have. You may find gcc supports --march=native which tell it to build for the...
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ibrahim gad
gad_12006
Jul 25, 2010 9:57 am
 Dear :  Jason Papadopoulos  First I would like to thank you for your help. Secondly, I'd love to Carry out the program with more than one machine at...
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petequek
Jul 26, 2010 7:17 am
... revision. ... -m64) but nothing works. Only the compiled 64-bit binaries from Jeff's site work. Can anyone advise me where I have gone wrong? ... you have....
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emilianobetti@...
emilianobett...
Jul 26, 2010 5:55 pm
Yes, I tried to post the following message, but maybe I did something wrong and I replied just to Pete. Emiliano I've got the same error. There is a bug in a...
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chris2be8
Jul 26, 2010 10:10 pm
... What sort of CPU do you have. /proc/cpuinfo will contain details of what Linux thinks you have. Chris K...
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kevin762401
Aug 7, 2010 12:36 pm
I managed to get Msieve running. As far as I am aware, it uses the quadratic sieve for factoring large integers. Apologies for the question, but how does one...
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chris2be8
Aug 7, 2010 2:03 pm
... I assume you are trying to use factmsieve.py. If so the paths are set at about line 60 in it (depending which version you have). They need to be set to the...
