mersenneforum.org 3- table
 Register FAQ Search Today's Posts Mark Forums Read

 2005-11-18, 22:16 #12 akruppa     "Nancy" Aug 2002 Alexandria 246710 Posts 3,575- c145 Code: Probable prime factor 1 has 68 digits: 18704988023033955131884066803385914940043877116522417022997906375751 Probable prime factor 2 has 78 digits: 142215002018456584026787063953316923624471539465701514401165258871874405518051 With GNFS. Alex
2005-11-18, 22:57   #13
ewmayer
2ω=0

Sep 2002
República de California

22×7×11×37 Posts

Quote:
 Originally Posted by akruppa Code: Probable prime factor 1 has 68 digits: 18704988023033955131884066803385914940043877116522417022997906375751
That p68 has an interesting p-1 decomposition. The p78 has both p-1 and p+1 factorizations that are similarly bimodal. Coincidence, or ... government conspiracy? ;)

Last fiddled with by ewmayer on 2005-11-18 at 22:59

 2005-11-19, 07:32 #14 akruppa     "Nancy" Aug 2002 Alexandria 9A316 Posts 3,515- Code: Probable prime factor 1 has 132 digits: 265583586915553954689927748193653317513152426592838510814462459025354527744076607109173885844248007550245844534973452272001013120031 Probable prime factor 2 has 50 digits: 81390061154901040915047190963509493467072953179621 Almost an ECM miss... Alex
 2005-11-20, 07:45 #15 akruppa     "Nancy" Aug 2002 Alexandria 9A316 Posts 3,461- Code: Probable prime factor 1 has 100 digits: 1407645001430838652409279287385962590549829189405923610118784371428955322561001003009596883643937181 Probable prime factor 2 has 58 digits: 1869566096395282675969776108567405541557601722844515411421 Alex Last fiddled with by akruppa on 2005-11-20 at 07:45
 2006-01-07, 11:49 #16 akruppa     "Nancy" Aug 2002 Alexandria 2,467 Posts 3,487- Code: Probable prime factor 1 has 130 digits: 1059783347923555991852540394513461822849063683120786921069969460393963920246933481940988854613458876298702446373118701075405804163 Probable prime factor 2 has 93 digits: 870250716374636481172397688250744935344421236524471557980004227913123906687196026086432880299 Nice factors, if I may say so myself. This completes the 3- table up to exponent 500. Alex
2006-01-07, 11:57   #17
xilman
Bamboozled!

May 2003
Down not across

22×3×7×112 Posts

Quote:
 Originally Posted by akruppa This completes the 3- table up to exponent 500.
Good!

NFSNET is getting close to finishing the base 2 tables to 768 bits. 2,761- is 2 days into an 18-day linear algebra run and the remaining target, 2,764+ is about 50% sieved at the moment.

Paul

 2006-05-08, 07:41 #18 akruppa     "Nancy" Aug 2002 Alexandria 9A316 Posts 3,587- Code: Using B1=44000000, B2=184367799126, polynomial Dickson(12), sigma=2274715394 Step 1 took 273930ms ********** Factor found in step 1: 65654207366367155415201780117119460885628511 Found probable prime factor of 44 digits: 65654207366367155415201780117119460885628511 Composite cofactor 21585250769864846738576241770380577158578983052487579755096824806192808088663105440498791650290446525171200813411738191269646749209804508226521716097 has 149 digits Edit: The group order is pretty smooth: 2^7 3^2 7 31 6287 15391 226777 243433 1718771 2988961 9570251, so B1=11M would still have found it in stage 1. Alex Last fiddled with by akruppa on 2006-05-08 at 07:53
2006-05-08, 11:34   #19
R.D. Silverman

Nov 2003

22·5·373 Posts

Quote:
 Originally Posted by akruppa Code: Using B1=44000000, B2=184367799126, polynomial Dickson(12), sigma=2274715394 Step 1 took 273930ms ********** Factor found in step 1: 65654207366367155415201780117119460885628511 Found probable prime factor of 44 digits: 65654207366367155415201780117119460885628511 Composite cofactor 21585250769864846738576241770380577158578983052487579755096824806192808088663105440498791650290446525171200813411738191269646749209804508226521716097 has 149 digits Edit: The group order is pretty smooth: 2^7 3^2 7 31 6287 15391 226777 243433 1718771 2988961 9570251, so B1=11M would still have found it in stage 1. Alex

I find it interesting that Bruce Dodson missed a 44 digit factor....

Last fiddled with by akruppa on 2006-05-09 at 20:57 Reason: Note: some followup postings moved to "Davar55 is a spammer"

2006-05-16, 11:34   #20
R.D. Silverman

Nov 2003

22×5×373 Posts

Quote:
 Originally Posted by akruppa Code: Using B1=44000000, B2=184367799126, polynomial Dickson(12), sigma=2274715394 Step 1 took 273930ms ********** Factor found in step 1: 65654207366367155415201780117119460885628511 Found probable prime factor of 44 digits: 65654207366367155415201780117119460885628511 Composite cofactor 21585250769864846738576241770380577158578983052487579755096824806192808088663105440498791650290446525171200813411738191269646749209804508226521716097 has 149 digits Edit: The group order is pretty smooth: 2^7 3^2 7 31 6287 15391 226777 243433 1718771 2988961 9570251, so B1=11M would still have found it in stage 1. Alex

Aoki-San just finished this. He found a 50-digit factor.

 2006-05-16, 13:52 #21 akruppa     "Nancy" Aug 2002 Alexandria 46438 Posts Jup, I already have removed the entry from the table. Alex

 Similar Threads Thread Thread Starter Forum Replies Last Post garo Cunningham Tables 85 2020-04-15 21:12 garo Cunningham Tables 82 2020-03-15 21:47 garo Cunningham Tables 99 2020-01-10 06:29 garo Cunningham Tables 79 2020-01-01 15:26 garo Cunningham Tables 41 2016-08-04 04:24

All times are UTC. The time now is 12:32.

Fri Aug 7 12:32:32 UTC 2020 up 21 days, 8:19, 1 user, load averages: 2.70, 2.45, 2.36