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Old 2014-01-10, 00:28   #1
ThomRuley
 
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Default OPN Project Roll Call

Just checking to see if anybody is still working on the Odd Perfect Numer factoring. I haven't heard from William lately, and apparently neither have several others. I thought a good first step may be to find out who is still working on these factorizations.
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Old 2014-01-10, 01:29   #2
RichD
 
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I still run a few ECM curves from the Composites Page and a NFS job ever once in a while.

I did notice this post from him a few days ago. I'm guessing he is pretty busy.
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Old 2014-01-10, 03:38   #3
wombatman
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I just finished up a C159 recently (see the factor thread). Once I get my Christmas components put in this weekend (helloooooooo Ivy-bridge-E and DDR2133 :D), I may work on some more.
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Old 2014-01-10, 16:34   #4
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I'm working on the SNFSable small composites in factordb. Which will include quite a few from OPN. Also the Brent tables which also include some OPN related numbers.

Chris
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Old 2019-04-07, 19:04   #5
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I just noticed the website http://oddperfect.org has gone away. The latest snapshot from the Way Back Machine is February 2 of this year. I haven't heard from William in a number of years.
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Old 2019-04-07, 19:11   #6
ThomRuley
 
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I've been working on and off with Pascal Ochem. He was doing some work over here:

http://www.lirmm.fr/~ochem/opn/
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Old 2019-04-07, 20:42   #7
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I haven't been able to help out the past few months (long story), but if you ask Pascal may have some composites lying around. I think he's still working on a proof that an OPN>10^2000
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Old 2019-04-07, 21:48   #8
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I have grabbed a subset from the MWRB file which meets the conditions: weight > 600 & SNFS difficulty is roughly between 210-250. That list is nearing completion. I have also done all the numbers in t600 that would fit into the 14e (NFS@Home) queue as a 31-bit job or less. I would send the number first to yoyo@home then off to NFS@Home if applicable. I would also grab a few higher SNFS difficulty numbers which have a high weight, say > 20K. Many of the latter yoyo would find a factor and very few made it to the 15e queue.

On my personal hardware I run SNFS jobs from the txxxx files mostly of the form p^5-1 and p^7-1. I'm up to SNFS-184 I believe.
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Old 2019-04-08, 08:51   #9
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I'm factoring composites from the MWRB file in SNFS difficulty order regardless of weight. There are no composites left with difficulty under 200 digits.
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Old 2019-04-09, 01:01   #10
ThomRuley
 
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What's MWRB?
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Old 2019-04-09, 01:39   #11
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Most Wanted RoadBlocks.
http://mersenneforum.org/showthread.php?p=275817

Last fiddled with by Uncwilly on 2019-04-09 at 01:39
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