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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2556193Factored
FactorDigitsBitsDate
319516382461697926877136269920731101.32020-07-05 10:49:35
ECM
DigitsB1Curves
255000041 / 280
Estimated T-Level: 20.7 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Dax Prather07DC9F1AF13A38B70
Verified (Factored)Remco Blaakmeer07DC9F1AF13A38B70
Verified (Factored)1999-09-22Michael Weinbrenner07DC9F1AF13A38B71434454
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-05M MillerAE66FB08A8D1B13C149037053
Verified2020-07-06marssystemsAE66FB08A8D1B13C1222442753
History
DateUserTypeResult
2020-07-06marssystemsC-PRP
M2556193/3195163824616979268771362699207 : AE66FB08A8D1B13C
PRP: Verified
PRP without proof (not generated)
2020-07-05M MillerC-PRP
M2556193/3195163824616979268771362699207 : AE66FB08A8D1B13C
PRP: Verified
PRP without proof (not generated)
2020-07-05Sergey NosovF-ECM
Factor: 3195163824616979268771362699207 / (ECM curve 2, B1=50000, B2=5000000)
2019-05-13TJAOINF
no factor from 2^67 to 2^68
2017-08-10Gordon SpenceNF
no factor from 2^66 to 2^67
2016-04-08mikrNF-PM1
B1=3200000, B2=112000000, E=12
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-08omylistNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2011-12-26c10ck3rNF
no factor from 2^61 to 2^62
2011-04-10James HeinrichNF-PM1
B1=175000, B2=4068750, E=6
2011-01-09JossNF-PM1
B1=50000
2011-01-03JossNF-PM1
B1=30000
2010-12-21JossNF-PM1
B1=20000
2009-02-01Sturle SundeNF
no factor from 2^60 to 2^61