Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
11271223Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
55905266091032.4old
644898803657211445.92008-09-08 07:29:13
6447467097740391549.22014-04-24 10:41:10
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-06-23Luigi MorelliC874F86F7CE889FC3801632853
History
DateUserTypeResult
2025-06-02vshNF
no factor from 2^71 to 2^72
2025-05-26vshNF-PM1
B1=10000000, B2=20021278200
2025-04-03vshNF
no factor from 2^70 to 2^71
2025-03-11vshNF
no factor from 2^69 to 2^70
2025-02-08vshNF
no factor from 2^68 to 2^69
2024-06-22vshNF-PM1
B1=625000, B2=296898420
2024-05-19vshNF-PM1
B1=312500, B2=60859260
2021-06-23chuenkitCERT
PRP Certification
Proof certified good
2021-06-23Luigi MorelliC-PRP
M11271223/5590526609/64489880365721/644746709774039 : C874F86F7CE889FC
PRP proof power = 8
PRP: Verified
Proof certified good
2014-04-24TJAOIF
Factor: 644746709774039
2008-09-08Will EdgingtonF
Factor: 64489880365721