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Old 2021-10-06, 17:07   #1959
firejuggler
 
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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.
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Old 2021-10-08, 23:06   #1960
James Heinrich
 
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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
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Old 2021-10-09, 22:03   #1961
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Maybe you were looking for this thread?

If I understand correctly, this one is only for factors of Mersenne numbers with prime exponents.
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Old 2021-10-09, 22:36   #1962
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Quote:
Originally Posted by kruoli View Post
Maybe you were looking for this thread?
I probably was.
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Old 2021-10-21, 04:03   #1963
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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.
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Old 2021-10-24, 11:56   #1964
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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
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Old 2021-10-29, 20:37   #1965
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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.
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Old 2021-10-30, 06:12   #1966
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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
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Old 2021-10-31, 03:55   #1967
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Sometimes you just have to laugh at stats...

This was a "one-off" timing test.
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Old 2021-10-31, 13:58   #1968
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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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Old 2021-10-31, 16:41   #1969
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Quote:
Originally Posted by nordi View Post
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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