Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
2375431Factored
FactorDigitsBitsDate
2663577382914515029006812477.82023-01-25 11:51:33
ECM
DigitsB1Curves
2550000194 / 280
Estimated T-Level: 23.5 ⓘ
TF below 2^73 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Donald Strom1D66AEA7073422010
Verified (Factored)1999-03-15Robert Mutschler1D66AEA707342201742131
Verified (Factored)2018-05-14kkmrkkblmbrbk1D66AEA7073422011873902
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-01-25LordJulius750E5CE4AE5CD0181168773153
P-1 factors
DateFactorB1B2
2023-01-252663577382914515029006811000000571651080
History
DateUserTypeResult
2023-01-25Chalkey300CERT
PRP Certification
Proof certified good
2023-01-25LordJuliusC-PRP
M2375431/266357738291451502900681 : 750E5CE4AE5CD018
PRP proof power = 7
PRP: Verified
Proof certified good
2023-01-25JossF-PM1
Factor: 266357738291451502900681 / (P-1, B1=1000000, B2=571651080)
2021-06-10TJAOINF
no factor from 2^68 to 2^69
2019-04-01TJAOINF
no factor from 2^67 to 2^68
2018-05-14kkmrkkblmbrbkC-LL
1D66AEA707342201
2017-06-16Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-10-31ramgeisNF
no factor from 2^65 to 2^66
2015-10-01mikrNF-PM1
B1=3000000, B2=100000000, E=12
2015-03-09VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-09VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-10JossNF-PM1
B1=127020
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-05-31Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-29markrNF-PM1
B1=100000, B2=2025000, E=6
2010-11-15JossNF-PM1
B1=20000
2010-11-07JossNF-PM1
B1=15000
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61