OPN Project Roll Call

ThomRuley · 2014-01-10, 00:28

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.

RichD · 2014-01-10, 01:29

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.

wombatman · 2014-01-10, 03:38

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.

chris2be8 · 2014-01-10, 16:34

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

RichD · 2019-04-07, 19:04

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.

ThomRuley · 2019-04-07, 19:11

I've been working on and off with Pascal Ochem. He was doing some work over here:

http://www.lirmm.fr/~ochem/opn/

ThomRuley · 2019-04-07, 20:42

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

RichD · 2019-04-07, 21:48

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.

Brownfox · 2019-04-08, 08:51

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.

ThomRuley · 2019-04-09, 01:01

What's MWRB?

Uncwilly · 2019-04-09, 01:39

Most Wanted RoadBlocks.
http://mersenneforum.org/showthread.php?p=275817

2014-01-10, 00:28	#1
ThomRuley May 2003 247₁₀ Posts	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.

2019-04-09, 01:39	#11
Uncwilly 6809 > 6502 """"""""""""""""""" Aug 2003 101×103 Posts 47·199 Posts	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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2014-01-10, 01:29	#2
RichD Sep 2008 Kansas 2²·3²·7·13 Posts	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.

2014-01-10, 03:38	#3
wombatman I moo ablest echo power! May 2013 1,741 Posts	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.

2014-01-10, 16:34	#4
chris2be8 Sep 2009 2,003 Posts	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

2019-04-07, 19:04	#5
RichD Sep 2008 Kansas 3276₁₀ Posts	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.

2019-04-07, 19:11	#6
ThomRuley May 2003 13·19 Posts	I've been working on and off with Pascal Ochem. He was doing some work over here: http://www.lirmm.fr/~ochem/opn/

2019-04-07, 20:42	#7
ThomRuley May 2003 367₈ Posts	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

2019-04-07, 21:48	#8
RichD Sep 2008 Kansas 2²·3²·7·13 Posts	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.

2019-04-08, 08:51	#9
Brownfox Dec 2017 3²×7 Posts	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.

2019-04-09, 01:01	#10
ThomRuley May 2003 13·19 Posts	What's MWRB?