Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1891333Factored
FactorDigitsBitsDate
919807145323225717192066.32017-01-17 15:27:34
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Dwayne Towell6AB0CF6F2929A5B70
Verified (Factored)1998-12-21Gary Untermeyer6AB0CF6F2929A5B7695539
Verified (Factored)2015-07-14MadPoo6AB0CF6F2929A5B71564605
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-04Oliver Kruse37512B2FD8E3534F1013
Verified2017-11-08ATH37512B2FD8E3534F133011113
History
DateUserTypeResult
2017-11-08ATHC-PRP
M1891333/91980714532322571719 : 37512B2FD8E3534F
PRP: Verified
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1891333/91980714532322571719 : 37512B2FD8E3534F
PRP: Verified
PRP without proof (not generated)
2017-01-21JossNF-PM1
B1=1036800
2017-01-17ConductorF
Factor: 91980714532322571719 / TF: 66-67
2016-12-26JossNF-PM1
B1=864000
2016-12-23JossNF-PM1
B1=720000
2016-10-26JossNF-PM1
B1=600000
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-08Bruno VictalNF-PM1
B1=500000, B2=15000000, E=12
2015-09-13ramgeisNF
no factor from 2^65 to 2^66
2015-07-14MadPooC-LL
6AB0CF6F2929A5B7
2015-05-11snme2pm1NF
no factor from 2^64 to 2^65
2015-05-11snme2pm1NF
no factor from 2^63 to 2^64
2012-01-20markrNF-PM1
B1=275000, B2=6000000, E=12
2011-03-08GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-11Architects CubedNF
no factor from 2^60 to 2^61