Hi @ all, just signed up and would like to say hello. I´m from Germany and interested in learning more about factoring, especially the ggnfs- package and...
Hello everyone, Is there a standard ggnfs benchmark showing its performance on different platforms? ie, Single-core vs Dual-core vs Quad-core, AMD vs Intel,...
... We did an evaluation over a bunch of platforms (ia64, power, x86-64) a while ago and found that Core2 (Woodcrest) was the absolute best with Opteron as...
Hi, I've noticed that with factorizations of cyclotomic numbers, the factlat.pl script chooses default parameters for a different size than the reported SNFS...
The default parameters are for 5th order algebraic polynomials. If you are using a suboptimal 4th or 6th order polynomial, then it simply adds some value to...
Hello! I want to use a SNFS polynomial to factor 5th fermat number (just for trying). I'm going to use m=2, f(x)=x^128+1. How can I get this into an...
You can use the nice 4th degree polynomial x^4+1 with m=2^32. Enter this as c4: 1, c0: 1, and m: (decimal expansion of 2^32). For reasonable sized inputs,...
Hello! I am not yet really familiar with GNFS and GGNFS, so here are some questions relating the factor base: 1. How do you use the factor base which is...
I'm trying to build matrix, but the same error appears: ... After keepFulls(), R->numFields = 6517178 Initial weight is: 196125108 ... final weight is:...
... This sounds like a library limit that cannot be worked around. You can try using msieve's postprocessing instead, it's completed some pretty large ...
Jason Papadopoulos
jasonp@...
Jul 3, 2007 1:02 pm
2083
... I think you are not using NTFS as file system. Which hardware and OS do you have? This FS doesn't allow you to create big files. On Windows you can convert...
... Maybe you should change to ext3 because reiserfs is not any more under active Development (i don't know if it is a solution to this problem and maybe data...
Binaries matbuild compilled under slackware 11 did not work correctly. Please, send me correctly working binary version of matbuild for linux/slackware....
I've noticed that most people tend to use a lot bigger FB than I usually use. This particular job was a C133 with a FB of 6m. The sieving was done on an AMD...
Hi, I normally use smaller FB than the suggestions in the def-par.txt file, at least at the top end. But I haven't done anything as big as C133 yet. My...
... file, at least at the top end. But I haven't done anything as big as C133 yet. ... digits? Thanks. rlim/alim: 5000000 lpbr/lpba: 27 mfbr/mfba: 51 lambda:...
Thanks. I don't have the the option to add large numbers of machines. Most of my "big" factorizations are done on a single AMD XP64-3400+. A 125-digit...
I have compiled GGNFS using the default settings (Makefile -> Makefile.athlon) and even successfully factored a SNFS difficulty 165 number on my first try. (It...
Xyzzy
michael.vang@...
Sep 6, 2007 4:49 pm
2092
I'm using the CVS source code (because the tgz file didn't work on my computer). You can try getting and compiling by executing following commands on you...
During my current factorization of a c137 the siever stops quite frequently with a return value 65280. Restarting with the same specialq returns the same...
I happened to have access to a cluster for a few hours and thought to try parallel sieving, on 28 nodes, of a target with SNFS difficulty=175. After choosing...
Sieving performed on four AMD cores (3800, dual 3600 and 4000). Final work performed on the 3800. The fb=6e6 was definitely too low. Next time I think I would...
Hello, I have a problem finishing a c133 factorization. I did the sieving and the matrix steps, (gave 32 deps). When running sqrt with every depnum, I get the...
I forgot to say it gives this error right after writing this line : Reading relations from rels.bin.0... I tried an older version of sqrt program and get a...
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