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
2566279Factored
FactorDigitsBitsDate
693860778462166116961450872685.82020-07-07 20:52:13
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)Joe Decker6E8F86599EB03FA10
Verified (Factored)1999-04-13Benoit Potvin6E8F86599EB03FA11866289
Verified (Factored)2018-06-15kkmrkkblmbrbk6E8F86599EB03FA11711664
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-07-10mnd9C5946F24FB1298BB1150376853
Verified2020-07-13roemer2201C5946F24FB1298BB146243053
History
DateUserTypeResult
2020-07-13roemer2201C-PRP
M2566279/69386077846216611696145087 : C5946F24FB1298BB
PRP: Verified
PRP without proof (not generated)
2020-07-10mnd9C-PRP
M2566279/69386077846216611696145087 : C5946F24FB1298BB
PRP: Verified
PRP without proof (not generated)
2020-07-07mnd9F-ECM
Factor: 69386077846216611696145087 / (ECM curve 2, B1=50000, B2=5000000, Sigma=381378251855044)
2019-06-03TJAOINF
no factor from 2^67 to 2^68
2018-06-15kkmrkkblmbrbkC-LL
6E8F86599EB03FA1
2017-08-13Gordon SpenceNF
no factor from 2^66 to 2^67
2016-05-21mikrNF-PM1
B1=3200000, B2=112000000, E=12
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-08ramgeisNF
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
2012-06-17Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-04-14James HeinrichNF-PM1
B1=175000, B2=4112500, E=6
2011-01-10JossNF-PM1
B1=50000
2011-01-03JossNF-PM1
B1=30000
2010-12-21JossNF-PM1
B1=20000
2009-01-29Sturle SundeNF
no factor from 2^60 to 2^61