20211006, 17:07  #1959 
"Vincent"
Apr 2010
Over the rainbow
2·3^{2}·149 Posts 
M6220651 has a 96.568bit (30digit) factor: 117465933684061090230298707631 (P1,B1=3000000,B2=243000000)
96 bits. at this exponent size, this is a beauty. 
20211008, 23:06  #1960 
"James Heinrich"
May 2004
exNorthern Ontario
3530_{10} Posts 
Not the normal kind of factor posted here, but I was YAFU'ing a C107 that was already ECM'd appropriately, but YAFU 1.34 likes to recalculate ECM effort and do a few more curves, which actually worked beautifully this time:
Code:
current ECM pretesting depth: 35.52 scheduled 67 curves at B1=3000000 toward target pretesting depth of 35.67 prp37 = 5217870316310181049264840173981775799 (curve 1 stg2 B1=3000000 sigma=3040696252 thread=0) What I expected to take ~8000 seconds took 9.5s Last fiddled with by James Heinrich on 20211008 at 23:08 
20211021, 04:03  #1963 
Sep 2002
3×269 Posts 
P1 found a factor in stage #2, B1=756000, B2=20988000.
UID: Jwb52z/Clay, M107023759 has a factor: 15845389801763193699707633 (P1, B1=756000, B2=20988000) 83.712 bits. 
20211024, 11:56  #1964 
Aug 2020
79*6581e4;3*2539e3
2·211 Posts 
Nothing spectacular, but the first P1 tests I did in a while and the first to finish stage 1 returned:
Code:
[Worker #3 Oct 24 07:53] P1 found a factor in stage #1, B1=779000. [Worker #3 Oct 24 07:53] M107043329 has a factor: 9773787110913045103371451921 (P1, B1=779000) k = 45653415314246463240 = 2^3 × 3^3 × 5 × 11 × 21841 × 317797 × 553649 
20211029, 20:37  #1965 
Sep 2002
3·269 Posts 
P1 found a factor in stage #1, B1=756000.
UID: Jwb52z/Clay, M107072687 has a factor: 95352689558688112327801 (P1, B1=756000) 76.336 bits. 
20211030, 06:12  #1966 
"Vincent"
Apr 2010
Over the rainbow
2·3^{2}·149 Posts 
M6234491 has a 107.827bit (33digit) factor: 287831359132009723766012795757047 (P1,B1=3000000,B2=243000000)
k=23 × 223 × 277 × 129 971 × 627 611 × 199 185 461 
20211031, 03:55  #1967 
If I May
"Chris Halsall"
Sep 2002
Barbados
2·5,023 Posts 

20211031, 13:58  #1968 
Dec 2016
5B_{16} Posts 
M260543 has a 102.431bit (31digit) factor: 6833981637847127989838565387041 (ECM,B1=1000000,B2=162000000,Sigma=3342767857012760)
That's the 9th known factor, Seth_Tr found the 8th factor in May. M194653 has a 124.361bit (38digit) factor: 27323512924583858950580510798298798737 (ECM,B1=3000000,B2=477000000,Sigma=6798721071652496) That's the 10th known factor , I found the 9th factor 2 months ago. 
20211031, 16:41  #1969  
Jul 2003
Behind BB
3×587 Posts 
Quote:


Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Bad Factor from PM1  petrw1  PrimeNet  31  20150324 16:49 
1M9M GPU TF vs. CPU P1/ECM (KWh/factor)  VictordeHolland  Lone Mersenne Hunters  4  20150307 09:29 
A fond farewell  rogue  Lounge  10  20081121 05:25 
New factor  fivemack  ElevenSmooth  4  20080507 19:28 
Shortest time to complete a 2^67 trial factor (no factor)  dsouza123  Software  12  20030821 18:38 