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
349499Factored
FactorDigitsBitsDate
1317872633534587445628262012786.82019-03-26 16:35:31
ECM
DigitsB1Curves
2550000280 / 280
30250000482 / 640
Estimated T-Level: 28.8 ⓘ
TF below 2^91 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski317A0
Verified (Factored)Unknown317A0
Verified (Factored)Guillermo Ballester Valor8C2CC5517AD8317A0
Verified (Factored)Eivind Triel8C2CC5517AD8317A86181
Verified (Factored)2001-12-08Dennis Pope8C2CC5517AD8317A342373
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-03-27Chang Chia-Tche9123A9386B6EC2A813597153
Verified2019-03-28kkmrkkblmbrbk9123A9386B6EC2A811729553
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2019-03-28kkmrkkblmbrbkC-PRP
M349499/131787263353458744562826201 : 9123A9386B6EC2A8
PRP: Verified
PRP without proof (small exponent)
2019-03-27Chang Chia-TcheC-PRP
M349499/131787263353458744562826201 : 9123A9386B6EC2A8
PRP: Verified
PRP without proof (small exponent)
2019-03-26alexF-ECM
Factor: 131787263353458744562826201 / (ECM curve 309, B1=250000, B2=25000000, Sigma=8888099429129111)
2018-02-16Gordon SpenceNF
no factor from 2^64 to 2^65
2018-02-05BloodERazorNF
no factor from 2^64 to 2^65
2016-11-02mikrNF-PM1
B1=60000000, B2=3000000000, E=12
2015-12-19Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-19Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-25NRNF
no factor from 2^61 to 2^62
2013-05-29lycornNF
no factor from 2^60 to 2^61
2012-02-16alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2011-08-14JossNF-PM1
B1=1298368
2009-01-26Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-30Sturle SundeNF
no factor from 2^58 to 2^59