mersenneforum.org Search Results
 User Name Remember Me? Password
 Register FAQ Search Today's Posts Mark Forums Read

 Showing results 1 to 25 of 1000 Search took 0.31 seconds. Search: Posts Made By: fivemack
 Forum: Factoring 2021-06-11, 22:37 Replies: 234 Views: 5,313 Posted By fivemack x^4 - 96*x^3 + 2232*x^2 - 17280*x + 32400 x^4 -... x^4 - 96*x^3 + 2232*x^2 - 17280*x + 32400 x^4 - 24*x^3 + 288*x^2 - 4320*x + 32400 x^4 + 192*x^3 - 5544*x^2 + 34560*x + 32400 I can't help noticing that those polynomials have increasing powers...
 Forum: Factoring 2021-06-11, 07:25 Replies: 234 Views: 5,313 Posted By fivemack May I take the C209 S210 from (5,-8) on line 88? May I take the C209 S210 from (5,-8) on line 88?
 Forum: Factoring 2021-06-11, 07:20 Replies: 234 Views: 5,313 Posted By fivemack Started 28*36 gmp-ecm curves at B1=3e8, default... Started 28*36 gmp-ecm curves at B1=3e8, default B2 on the C253 from [8,-8]. That's going to be an extremely difficult SNFS job, my hope for finishing that corner is that ECM breaks off a piece big...
 Forum: Factoring 2021-06-11, 07:04 Replies: 234 Views: 5,313 Posted By fivemack Line 99 done (c139 split as p54 x p85 in 3h20m... Line 99 done (c139 split as p54 x p85 in 3h20m wall-time on 28-thread Skylake)
 Forum: Factoring 2021-06-10, 19:44 Replies: 234 Views: 5,313 Posted By fivemack Having extracted a 22-digit prime factor by 30... Having extracted a 22-digit prime factor by 30 thread-hours of SNFS from the c157 on line 99, I'm now running ECM on the other two integers. An even wiser person might have done it the other way...
 Forum: Astronomy 2021-06-10, 19:30 Replies: 42 Views: 3,120 Posted By fivemack 1/4000 f/36 through cloud, after a short drive to... 1/4000 f/36 through cloud, after a short drive to get a bit south of Cambridge where the cloud cover was less complete: https://www.chiark.greenend.org.uk/~twomack/eclipse.jpg
 Forum: Factoring 2021-06-10, 17:06 Replies: 234 Views: 5,313 Posted By fivemack OK, line 99 I'll start with the S160. I was... OK, line 99 I'll start with the S160. I was briefly a Magma developer in a past life (I'm not sure whether my four-descent code is still in the current version, but I spent a lovely...
 Forum: Factoring 2021-06-10, 09:17 Replies: 234 Views: 5,313 Posted By fivemack Line 56 (6,-7) complete by SNFS. Required rather... Line 56 (6,-7) complete by SNFS. Required rather more relations than I was expecting (29.7m raw worked, 29.3m raw didn't) and about 1100 thread-hours, so three or four days on a not-very-idle...
 Forum: Factoring 2021-06-07, 20:54 Replies: 234 Views: 5,313 Posted By fivemack For the C164 (SNFS 168.6) from (2,-8), I used ... For the C164 (SNFS 168.6) from (2,-8), I used rlim=alim=6000000 sieve Q=4.6M-7.0M lpbr=lpba=27 mfbr=mfba=54 alambda=rlambda=2.6 gnfs-lasieve4I14e It might be worth using 3LPR even at this...
 Forum: Factoring 2021-06-07, 07:17 Replies: 234 Views: 5,313 Posted By fivemack Found a P45 in the C227 from (7,-8) by ECM, which... Found a P45 in the C227 from (7,-8) by ECM, which at least makes that line just about tractable by GNFS in the medium term. Will now wait a moment until you are confident all the GCDs are killed...
 Forum: Factoring 2021-06-05, 13:18 Replies: 234 Views: 5,313 Posted By fivemack (5,-6) finished - the C139 has a P26 by ecm (5,-6) finished - the C139 has a P26 by ecm
 Forum: Factoring 2021-06-05, 10:24 Replies: 234 Views: 5,313 Posted By fivemack Taking the cofactors from (7,-7); initially a day... Taking the cofactors from (7,-7); initially a day of ECM on a dozen cores
 Forum: Factoring 2021-06-05, 08:42 Replies: 234 Views: 5,313 Posted By fivemack C156 from (6,-7) completed by ECM (p27, p39) ... C156 from (6,-7) completed by ECM (p27, p39) Taken a P25 out of the C152 and a P30 out of the C187 PS: also two P36 out of the C187, which is complete
 Forum: Factoring 2021-06-05, 08:09 Replies: 234 Views: 5,313 Posted By fivemack I'll take the two (5,-6) ones to start with; this... I'll take the two (5,-6) ones to start with; this is a research direction I've been interested in since my PhD in early 2000s. Could you also send me the SNFS polynomial for (3,-7) ? I am also...
 Forum: Hardware 2021-05-20, 11:42 Replies: 849 Views: 163,678 Posted By fivemack Asus X99-A motherboard, second-hand E5-2673v4,... Asus X99-A motherboard, second-hand E5-2673v4, running 20 threads at one per core [Work thread May 20 12:44] Resuming primality test of M54082397 using FMA3 FFT length 2880K, Pass1=384,...
 Forum: Homework Help 2021-05-20, 08:44 Replies: 39 Views: 3,609 Posted By fivemack How on Earth did you notice that? I suppose... How on Earth did you notice that? I suppose 'divisible by any number in OEIS' isn't a very large computation, but I wasn't aware that you could download the list of numbers in OEIS easily.
 Forum: Information & Answers 2021-05-12, 18:17 Replies: 13 Views: 344 Posted By fivemack Keeping Win10 laptop running flat-out I have disabled 'turn off screen' and 'sleep' in the performance control panel, which seemed the only thing I could disable. Nonetheless my laptop iteration times go up by about a factor two after...
 Forum: Lounge 2021-03-08, 10:42 Replies: 46 Views: 3,589 Posted By fivemack I did manage to get to the summit of Kilimanjaro,... I did manage to get to the summit of Kilimanjaro, though it was probably the most arduous thing I've ever done: there's a couple of hours gap in my memory from the middle of the ascent to the crater...
 Forum: NFS@Home 2021-02-04, 15:30 Replies: 40 Views: 6,769 Posted By fivemack 6400 curves at B1=260M found no factor for L2250;... 6400 curves at B1=260M found no factor for L2250; I've queued up the job while post-processing a further 3840 curves. It looks rather low yield even for an SNFS-250 quartic, but 300MQ ought to get...
 Forum: NFS@Home 2021-01-30, 11:19 Replies: 13 Views: 2,121 Posted By fivemack L2995A done Fri Jan 29 16:21:09 2021 p70 factor: 1766931035816663530033036837955675983886671972196464946006728364437711 Fri Jan 29 16:21:09 2021 p142 factor:...
 Forum: NFS@Home 2021-01-29, 08:52 Replies: 40 Views: 6,769 Posted By fivemack The few thousand curves found a factor, I've... The few thousand curves found a factor, I've deleted the job and started running curves on L2250
 Forum: NFS@Home 2021-01-21, 15:27 Replies: 40 Views: 6,769 Posted By fivemack I've put L3065B (SNFS quartic, no small factor... I've put L3065B (SNFS quartic, no small factor known) onto the 16fs queue. Not quite sure how much ECM has been done on it; it won't get to the front of the queue any time soon so I'll run a few...
 Forum: NFS@Home 2021-01-21, 15:17 Replies: 13 Views: 2,121 Posted By fivemack L2995A linalg started, should be done by end of... L2995A linalg started, should be done by end of January (32M matrix at density 100)
 Forum: Factoring 2021-01-03, 00:20 Replies: 513 Views: 92,848 Posted By fivemack L1513 finished 202-digit GNFS done locally Tue Aug 4 13:05:29 2020 R0: -1028224595046037683938542391736748085046 Tue Aug 4 13:05:29 2020 R1: 4848130132767804170091793 Tue Aug 4 13:05:29 2020 A0:...
 Forum: Information & Answers 2020-11-17, 12:43 Replies: 27 Views: 3,824 Posted By fivemack Did you (or prime.txt) do anything non-obvious... Did you (or prime.txt) do anything non-obvious with assignment of CPU cores to workers? If the old system was running one worker on 012345 and the other on 6789ab, and that's stayed the same for the...
 Showing results 1 to 25 of 1000

All times are UTC. The time now is 11:04.

Sat Jun 12 11:04:46 UTC 2021 up 15 days, 8:52, 0 users, load averages: 1.46, 1.56, 1.56