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
2212657Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
6088624372052753602366072479.02015-12-11 13:23:50
ECM
DigitsB1Curves
2550000263 / 280
Estimated T-Level: 24.7 ⓘ
TF below 2^77 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Remco BlaakmeerB7A75F59ED02CD660
Verified (Factored)1999-02-07Louis TowlesB7A75F59ED02CD661708569
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertron95EA0AF9AD409BCB1013
Verified2017-10-26Oliver Kruse95EA0AF9AD409BCB158044113
P-1 factors
DateFactorB1B2
2015-12-11608862437205275360236607200000065000000
History
DateUserTypeResult
2017-10-26Oliver KruseC-PRP
M2212657/608862437205275360236607 : 95EA0AF9AD409BCB
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2212657/608862437205275360236607 : 95EA0AF9AD409BCB
PRP: Verified
PRP without proof (not generated)
2016-04-21alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-12-11Alexander DubrovinF-PM1
Factor: 608862437205275360236607 / (P-1, B1=2000000, B2=65000000, E=12)
2015-11-14Alexander DubrovinNF-PM1
B1=1500000, B2=10000000, E=12
2015-11-14Alexander DubrovinNF-PM1
B1=1000000, B2=5000000, E=6
2015-10-22ramgeisNF
no factor from 2^65 to 2^66
2015-03-06VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-06VictordeHollanderNF
no factor from 2^63 to 2^64
2013-12-03LaurVNF
no factor from 2^62 to 2^63
2012-01-07Squeeky_SquirrelNF-PM1
B1=135000, B2=2733750, E=6
2011-01-16JossNF-PM1
B1=50000
2009-01-07Sturle SundeNF
no factor from 2^61 to 2^62
2009-01-03Sturle SundeNF
no factor from 2^60 to 2^61