Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
12871841Factored
FactorDigitsBitsDate
5317476334006504547940442312788.82015-07-24 12:04:53
LL
StatusDateUserResidueShift
Verified (Factored)2001-12-22Fred Marotto08F8BE76A0CE65FE5532206
Verified (Factored)2004-10-03Robert Tjia08F8BE76A0CE65FE10236439
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-05-18XZT7EE9E6FD2594558F11023164753
P-1 factors
DateFactorB1B2
2015-07-245317476334006504547940442313000006000000
History
DateUserTypeResult
2022-05-20nordiNF-PM1
B1=400000, B2=428459850
2022-05-18GufesaCERT
PRP Certification
Proof certified good
2022-05-18XZTC-PRP
M12871841/531747633400650454794044231 : 7EE9E6FD2594558F
PRP proof power = 8
PRP: Verified
Proof certified good
2022-04-19nordiNF-PM1
B1=400000
2015-07-24ThaF-PM1
Factor: 531747633400650454794044231
2015-04-11ThaNF
no factor from 2^66 to 2^67
2014-04-27NesowaNF
no factor from 2^65 to 2^66
2013-06-02lycornNF
no factor from 2^64 to 2^65