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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
6721769Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
367062680491335185692065.02014-07-03 22:36:48
8417021929405673246092169.52025-01-07 20:21:34
ECM
DigitsB1Curves
25500003 / 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)1999-02-14Rob Beairsto3D8D8A7B828FE8720
Verified (Factored)2001-10-13Greenlee Brittenum3D8D8A7B828FE8725845423
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2018-01-06Oliver KruseFE78C548C1DDA4E01649611053
Verified (Factored)2018-12-03ATHFE78C548C1DDA4E01449526253
Verified2025-01-14PrimeNRFE78C548C1DDA4E02529345753
P-1 factors
DateFactorB1B2
2025-01-078417021929405673246099920001970702580
History
DateUserTypeResult
2025-01-14ChuckCERT
PRP Certification
Proof certified good
2025-01-14PrimeNRC-PRP
M6721769/36706268049133518569/841702192940567324609 : FE78C548C1DDA4E0
PRP proof power = 8
PRP: Verified
Proof certified good
2025-01-07Stef42F-PM1
Factor: 841702192940567324609 / (P-1, B1=992000, B2=1970702580)
2018-12-03ATHC-PRP
M6721769/36706268049133518569 : FE78C548C1DDA4E0
PRP: Verified (Factored)
PRP without proof (not generated)
2018-01-06Oliver KruseC-PRP
M6721769/36706268049133518569 : FE78C548C1DDA4E0
PRP: Verified (Factored)
PRP without proof (not generated)
2014-07-03lycornF
Factor: 36706268049133518569 / TF: 64-65*
2014-06-29NesowaNF
no factor from 2^63 to 2^64
2012-07-14NesowaNF-PM1
B1=80000, B2=1440000, E=6