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
3238667Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
66662692073353389111962.52013-01-03 09:13:41
ECM
DigitsB1Curves
25500006 / 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)1998-09-06John R Pierce3EDEBB7FA8AF795E0
Verified (Factored)1999-07-12Hilhorst3EDEBB7FA8AF795E418255
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-11-02Oliver KruseFAC496F5AC8C7E381165209353
Verified2017-12-13kkmrkkblmbrbkFAC496F5AC8C7E381159832753
History
DateUserTypeResult
2022-04-05LordJuliusNF
no factor from 2^66 to 2^67
2022-04-05LordJuliusNF
no factor from 2^65 to 2^66
2022-04-05LordJuliusNF
no factor from 2^64 to 2^65
2022-04-05LordJuliusNF
no factor from 2^63 to 2^64
2022-04-05LordJuliusNF
no factor from 2^1 to 2^62
2022-04-05LordJuliusNF
no factor from 2^1 to 2^61
2022-02-04JossNF-PM1
B1=1000000, B2=119912100
2021-05-11JossNF
no factor from 2^67 to 2^68
2019-10-04JossNF-PM1
B1=323867, B2=3238670, E=6
2017-12-13kkmrkkblmbrbkC-PRP
M3238667/6666269207335338911 : FAC496F5AC8C7E38
PRP: Verified
PRP without proof (not generated)
2017-11-02Oliver KruseC-PRP
M3238667/6666269207335338911 : FAC496F5AC8C7E38
PRP: Verified
PRP without proof (not generated)
2013-01-03dbaughF
Factor: 6666269207335338911
2011-09-08USAFSSNF-PM1
B1=55000, B2=866250, E=6
2011-07-25Carsten KossendeyNF
no factor from 2^61 to 2^62
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=191250