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 2021-10-06, 17:07 #1959 firejuggler     "Vincent" Apr 2010 Over the rainbow 51728 Posts M6220651 has a 96.568-bit (30-digit) factor: 117465933684061090230298707631 (P-1,B1=3000000,B2=243000000) 96 bits. at this exponent size, this is a beauty.
 2021-10-08, 23:06 #1960 James Heinrich     "James Heinrich" May 2004 ex-Northern Ontario 2·5·353 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) The first (second?) curve split the C107=p37+p70 What I expected to take ~8000 seconds took 9.5s Last fiddled with by James Heinrich on 2021-10-08 at 23:08
 2021-10-09, 22:03 #1961 kruoli     "Oliver" Sep 2017 Porta Westfalica, DE 28×3 Posts Maybe you were looking for this thread? If I understand correctly, this one is only for factors of Mersenne numbers with prime exponents.
2021-10-09, 22:36   #1962
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

2×5×353 Posts

Quote:
 Originally Posted by kruoli Maybe you were looking for this thread?
I probably was.

 2021-10-21, 04:03 #1963 Jwb52z     Sep 2002 11001001112 Posts P-1 found a factor in stage #2, B1=756000, B2=20988000. UID: Jwb52z/Clay, M107023759 has a factor: 15845389801763193699707633 (P-1, B1=756000, B2=20988000) 83.712 bits.
 2021-10-24, 11:56 #1964 bur     Aug 2020 79*6581e-4;3*2539e-3 2×211 Posts Nothing spectacular, but the first P-1 tests I did in a while and the first to finish stage 1 returned: Code: [Worker #3 Oct 24 07:53] P-1 found a factor in stage #1, B1=779000. [Worker #3 Oct 24 07:53] M107043329 has a factor: 9773787110913045103371451921 (P-1, B1=779000) k = 45653415314246463240 = 2^3 × 3^3 × 5 × 11 × 21841 × 317797 × 553649
 2021-10-29, 20:37 #1965 Jwb52z     Sep 2002 3·269 Posts P-1 found a factor in stage #1, B1=756000. UID: Jwb52z/Clay, M107072687 has a factor: 95352689558688112327801 (P-1, B1=756000) 76.336 bits.
 2021-10-30, 06:12 #1966 firejuggler     "Vincent" Apr 2010 Over the rainbow 268210 Posts M6234491 has a 107.827-bit (33-digit) factor: 287831359132009723766012795757047 (P-1,B1=3000000,B2=243000000) k=23 × 223 × 277 × 129 971 × 627 611 × 199 185 461
 2021-10-31, 03:55 #1967 chalsall If I May     "Chris Halsall" Sep 2002 Barbados 234768 Posts Sometimes you just have to laugh at stats... This was a "one-off" timing test.
 2021-10-31, 13:58 #1968 nordi   Dec 2016 2·32·5 Posts M260543 has a 102.431-bit (31-digit) 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 124.361-bit (38-digit) factor: 27323512924583858950580510798298798737 (ECM,B1=3000000,B2=477000000,Sigma=6798721071652496) That's the 10th known factor , I found the 9th factor 2 months ago.
2021-10-31, 16:41   #1969
masser

Jul 2003
Behind BB

3·587 Posts

Quote:
 Originally Posted by nordi M260543 has a 102.431-bit (31-digit) 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 124.361-bit (38-digit) factor: 27323512924583858950580510798298798737 (ECM,B1=3000000,B2=477000000,Sigma=6798721071652496) That's the 10th known factor , I found the 9th factor 2 months ago.

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