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

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Exponent Range:










MnStatusDetails
1204649Factored
FactorDigitsBitsDate
1182503472908338791138072476.62014-12-27 01:02:15
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 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)David Slowinski4BA0
Verified (Factored)Joel SmithFE91A67D2FF064BA0
Verified (Factored)Tom CageFE91A67D2FF064BA0
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-29Oliver KruseFAB5A971EC71F9851013
Verified2017-10-18Oliver KruseFAB5A971EC71F98516909513
Verified2018-01-03ATHFAB5A971EC71F985133037413
P-1 factors
DateFactorB1B2
2014-12-271182503472908338791138074218475156083565
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^59 to 2^60
2018-01-03ATHC-PRP
M1204649/118250347290833879113807 : FAB5A971EC71F985
PRP: Verified
PRP without proof (not generated)
2017-10-18Oliver KruseC-PRP
M1204649/118250347290833879113807 : FAB5A971EC71F985
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1204649/118250347290833879113807 : FAB5A971EC71F985
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12
2014-12-27mikrF-PM1
Factor: 118250347290833879113807 / (P-1, B1=4218475, B2=156083565, E=12)
2014-09-17-Anonymous-NF-PM1
B1=253280
2014-04-17JossNF-PM1
B1=200000
2012-10-07dbaughNF
no factor from 2^62 to 2^63
2011-05-09XyzzyNF
no factor from 2^61 to 2^62
2009-02-15Sturle SundeNF
no factor from 2^60 to 2^61