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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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"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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