Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
3481319Factored
FactorDigitsBitsDate
8706357291375116930712169.62012-02-26 18:51:58
ECM
DigitsB1Curves
25500005 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Paul FoxworthyBB7615D75B2B9C9F0
Verified (Factored)1999-07-04Daniel SwansonBB7615D75B2B9C9F3039507
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-11-07Oliver Kruse0E011CDCA18F55731154869453
Verified2017-12-16kkmrkkblmbrbk0E011CDCA18F5573184605453
History
DateUserTypeResult
2022-05-30LordJuliusNF
no factor from 2^66 to 2^67
2022-05-30LordJuliusNF
no factor from 2^65 to 2^66
2022-05-27LordJuliusNF
no factor from 2^64 to 2^65
2022-05-27LordJuliusNF
no factor from 2^63 to 2^64
2022-05-27LordJuliusNF
no factor from 2^62 to 2^63
2022-05-27LordJuliusNF
no factor from 2^1 to 2^62
2022-01-22JossNF-PM1
B1=1000000, B2=114656850
2021-12-12JossNF
no factor from 2^68 to 2^69
2021-06-13JossNF
no factor from 2^67 to 2^68
2021-02-24JossNF
no factor from 2^65 to 2^66
2021-02-18JossNF-PM1
B1=348131, B2=3829450, E=6
2017-12-16kkmrkkblmbrbkC-PRP
M3481319/870635729137511693071 : 0E011CDCA18F5573
PRP: Verified
PRP without proof (not generated)
2017-11-07Oliver KruseC-PRP
M3481319/870635729137511693071 : 0E011CDCA18F5573
PRP: Verified
PRP without proof (not generated)
2012-02-26alan145F-ECM
Factor: 870635729137511693071
2011-11-13USAFSSNF-PM1
B1=60000, B2=990000, E=6
2011-07-20markrNF
no factor from 2^61 to 2^62
2009-07-07Carsten KossendeyNF-PM1
B1=20000, B2=240000
2009-03-19S485122NF
no factor from 2^60 to 2^61