Hello, I would like to factorize a 139-digit number by ggnfs (my largest one up to now is 135 digits). Any advice about the parameters for such size ? Thanks...
I just finished a c198 SNFS factorization with ggnfs-0.77.1-20060513. After sieving and matsolve completed, sqrt failed to find the factorization after going...
Hi, Please email the patch to me (or put it in the files area) and I'll test it and incorporate it into the CVS sources. It may be a manifestation of this bug...
I've posted the patch (against CVS head) under the Files area as "sqrt_fpe_patch.txt". One disclaimer - in the computeDelta() function, it is still possible...
While investigating that floating point exception in sqrt, I tried to test my patch after rebuilding sqrt with debugging off and optimizing on, and it failed...
Posted by: "Tom Wu" tjw99@... tjw99 ... -ffast-math has caused me a few problems on PPC in the past too. However, it's a composite flag, and expands into...
... individual ... individual ... The troublemaker is "-funsafe-math-optimizations", which seems unsurprising given the name. Specifying just that triggers...
congrats!!! that's the biggest GGNFS factorization I've seen. it's great to see that the code has matured to the point where it can handle it. now if that...
Your patch has been incorporated into the CVS version. I have also disabled -ffast-math in the CVS version per your findings. If you would like to write a...
Sorry if this has been answered in the ggnfs FAQ somewhere or other, but if it has I'd appreciate a clue or two :-) It's the old "horribly wrong", "column a =...
I've found that that I have random matrix problems at times when maxrelsinff is set to 0 in factLat.pl. At times when there are barely enough relations to...
... Thanks Greg. I can't remember when I last played around with $maxRelsInFF in factLat.pl - probably over 12 months ago. No obvious benefits (long...
I faced this probelms many times, and found out that this happens beacuse some duplicates are still in the processed data (rels.bin's).The soloution is dump...
... Thanks, Raghu. I didn't try dumping and re-processing - I've tried that many times in the past and the results are quite random. Sometimes they work but...
Compile GGNFS on FreeBSD,error occures. $ make make: "/home/psycho/ggnfs/Makefile" line 16 : Need an operator make: Fatal errors encountered -- cannot continue...
Hello, a> Hi, I'm trying to factor a self-generated rsa512 to test some things. You are trying to factor VERY hard number (for GGNFS). If you want "to test...
... things. ... I've tested some 100-120 digits and they worked great (with a single core and 1-7 days of workload) Does snfs could do it easily? ... found a ...
Hi, I've tried to build ggnfs-0.77.1-20060513 on an Opteron but ran into a problem: procrels crashes with a segfault. This apparantly is due to the mremap()...
I'm not up to trying to use ggnfs yet; I just want to understand how various parts of NFS work. For example, I'm fuzzy on whether SHARK is mostly the same as...
... Try using GNU Make. -- Alok Riffle West Virginia is so small that the Boy Scout had to double as the town drunk. -- This message has been scanned for...
Hi, I am trying to factor a C130, and have found that matsolve is not behaving itself (or, perhaps, the relations I found were not very good). After matsolve...
... Thanks. I think that I will try reprocessing the relations. I have in the past had a little trouble with that: I change the ALIM and RLIM values, this...
In my experience, you just need to sieve a little more. In factLat.pl, is maxrelsinff set to 0? If so, that often causes it to stop sieving too early....
Another idea ... this also sometimes happens if you've sieved too much as well and matprune is significantly decreasing the size of the matrix. If you...
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