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 Showing results 1 to 25 of 103 Search took 0.04 seconds. Search: Posts Made By: charybdis
 Forum: Factoring 2020-10-19, 18:59 Replies: 5 Views: 129 Posted By charybdis I've stuck in a couple of lines to exclude... I've stuck in a couple of lines to exclude cofactors between 61 and 64 bits. 60 might be a bit lower than optimal but it matches the bound on the rational side. The siever appears to be running...
 Forum: Factoring 2020-10-19, 00:33 Replies: 5 Views: 129 Posted By charybdis Should have realised that I could just search in... Should have realised that I could just search in a relations file to find an answer to my question :doh!: Here's one from a job with lim1=175M, lpb1=32, mfb1=90:...
 Forum: Factoring 2020-10-19, 00:05 Replies: 5 Views: 129 Posted By charybdis CADO definitely deals with these properly - see... CADO definitely deals with these properly - see this snippet from sieve/las-cofactor.cpp: nd = mpz_get_d (n); B = (double) scs.lim; kB = B * B; for (klpb = lpb; klpb < s; klpb += lpb,...
 Forum: Msieve 2020-10-18, 23:57 Replies: 171 Views: 23,326 Posted By charybdis c184 That record didn't last too long :smile: Cofactor of HCN 7+3_317: n:...
 Forum: Factoring 2020-10-18, 23:35 Replies: 5 Views: 129 Posted By charybdis NFS cofactorization with 3LP When sieving with 2 large primes, one tends to find that the optimal value of mfb is slightly less than 2*lpb. Presumably this is because a composite cofactor close to 2^(2*lpb) is unlikely to split...
 Forum: CADO-NFS 2020-10-07, 01:47 Replies: 127 Views: 4,832 Posted By charybdis c184 32/32 run: sieving 30M-205M took 112M... c184 32/32 run: sieving 30M-205M took 112M CPU-seconds and gave Tue Oct 6 23:43:20 2020 Msieve v. 1.54 (SVN 1030M) Tue Oct 6 23:43:20 2020 random seeds: 7a19fd23 910545fb Tue Oct 6 23:43:20...
 Forum: Lone Mersenne Hunters 2020-10-01, 21:00 Replies: 1,705 Views: 143,466 Posted By charybdis The important word is "unfactored". Lots of these... The important word is "unfactored". Lots of these numbers had already been completely factored. These are all genuine ECM factors. The ones from 2010 were found by Bos, Kleinjung et al,...
 Forum: Lone Mersenne Hunters 2020-09-30, 13:26 Replies: 1,705 Views: 143,466 Posted By charybdis These were all done by NFS, per the Cunningham... These were all done by NFS, per the Cunningham tables site (https://homes.cerias.purdue.edu/~ssw/cun/oldp/index.html): 1061 1129 991 1193 1151 863 823 1153
 Forum: CADO-NFS 2020-09-25, 17:22 Replies: 127 Views: 4,832 Posted By charybdis 110.4M CPU-seconds of sieving, from 30M to 207M,... 110.4M CPU-seconds of sieving, from 30M to 207M, gave: Fri Sep 25 13:16:07 2020 commencing relation filtering Fri Sep 25 13:16:07 2020 setting target matrix density to 110.0 ... Fri Sep 25...
 Forum: CADO-NFS 2020-09-24, 17:40 Replies: 127 Views: 4,832 Posted By charybdis Decided to try an early filtering run to get an... Decided to try an early filtering run to get an idea of how many relations would be needed to build a matrix, and unexpectedly found I already had enough: Thu Sep 24 13:58:53 2020 Msieve v. 1.54...
 Forum: Msieve 2020-09-20, 21:37 Replies: 1,965 Views: 101,636 Posted By charybdis c183 polys Here are a few, fresh from the CADO oven: n:...
 Forum: CADO-NFS 2020-09-13, 16:21 Replies: 127 Views: 4,832 Posted By charybdis Sieving Q from 30M to 201M took 109.9M... Sieving Q from 30M to 201M took 109.9M CPU-seconds, and produced: Sun Sep 13 13:55:54 2020 commencing relation filtering Sun Sep 13 13:55:54 2020 setting target matrix density to 110.0 Sun Sep...
 Forum: CADO-NFS 2020-09-12, 18:53 Replies: 127 Views: 4,832 Posted By charybdis First successful attempt at a matrix for the c184... First successful attempt at a matrix for the c184 from 4+3_466: Sat Sep 12 17:35:10 2020 Msieve v. 1.54 (SVN 1030M) Sat Sep 12 17:35:10 2020 random seeds: 24ad7ccb b689eb64 Sat Sep 12 17:35:10...
 Forum: Msieve 2020-09-08, 00:20 Replies: 171 Views: 23,326 Posted By charybdis Are you sure the difference in skews isn't down... Are you sure the difference in skews isn't down to CADO and msieve having different methods for computing the skew? The two polys have very similar coefficient sizes. I'm happy for the spun...
 Forum: Msieve 2020-09-03, 21:09 Replies: 171 Views: 23,326 Posted By charybdis c184 Cofactor of HCN 4+3_466: n:...
 Forum: CADO-NFS 2020-09-02, 23:36 Replies: 127 Views: 4,832 Posted By charybdis This is what I've got for c180: ... This is what I've got for c180: ########################################################################### # Polynomial selection...
 Forum: CADO-NFS 2020-09-01, 23:43 Replies: 127 Views: 4,832 Posted By charybdis The c183 stats below aren't directly comparable... The c183 stats below aren't directly comparable to those for the c182 above, for a couple of reasons. Firstly, I ran the c183 on a slightly different set of machines, giving about a 1% speedup in...
 Forum: Msieve 2020-08-24, 23:34 Replies: 171 Views: 23,326 Posted By charybdis c183 Cofactor of HCN 10+7_302: n:...
 Forum: CADO-NFS 2020-08-23, 16:22 Replies: 127 Views: 4,832 Posted By charybdis c182 stats: Poly score 6.643e-14. 98.0M... c182 stats: Poly score 6.643e-14. 98.0M CPU-seconds sieving (Q 20M-181.4M) for 321M raw relations, 218M unique. TD=110 produced a 17.8M matrix. The parameters are still holding up fairly well...
 Forum: Msieve 2020-08-17, 15:58 Replies: 1,965 Views: 101,636 Posted By charybdis Here's one: n:... Here's one: n: 9536454284838131188510297375465325383144598450008668632355935685754692107419202674411506591342057862756227100567184249373517764331520778025660438418594966383559123819525015791...
 Forum: CADO-NFS 2020-08-16, 01:14 Replies: 127 Views: 4,832 Posted By charybdis Despite what sieve/README.descent says ("in the... Despite what sieve/README.descent says ("in the first case, lambda defaults to mfb0/lpb0+0.1 as everywhere else in cado-nfs"), it looks like I was wrong, and presumably that readme file is outdated....
 Forum: CADO-NFS 2020-08-15, 02:19 Replies: 127 Views: 4,832 Posted By charybdis The last c180 did indeed finish around 130M; the... The last c180 did indeed finish around 130M; the other numbers had slightly better polys and finished closer to 120M.
 Forum: CADO-NFS 2020-08-15, 01:44 Replies: 127 Views: 4,832 Posted By charybdis Stats for c180 with lambda0=1.93: Poly score... Stats for c180 with lambda0=1.93: Poly score 9.285e-14. 70.2M CPU-seconds sieving for 322M raw relations, 218M unique. TD=110 produced a 15.8M matrix. Poly is ~7% worse than the c179 that I...
 Forum: CADO-NFS 2020-08-10, 18:39 Replies: 23 Views: 3,749 Posted By charybdis Tried this out - a single instance of las with... Tried this out - a single instance of las with their parameters uses 38GB of memory :max:
 Forum: CADO-NFS 2020-08-09, 01:49 Replies: 127 Views: 4,832 Posted By charybdis c180 results: Poly score 9.842e-14, within 2%... c180 results: Poly score 9.842e-14, within 2% of the score for the last c179. 65.1M CPU-sec sieving for 321M raw relations, 225M unique. TD=110 produced a 16.6M matrix. mfb0=59 doesn't seem...
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