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
1805963Factored
FactorDigitsBitsDate
76276455974971654541032272.72013-07-14 04:43:09
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)Robert Clark4300D7BF076376210
Verified (Factored)1998-12-21Terry S. Arnold4300D7BF0763762168199
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-03Oliver Kruse37C3D2C4B6A1C3E21013
Verified2017-11-05ATH37C3D2C4B6A1C3E2121329913
History
DateUserTypeResult
2017-11-05ATHC-PRP
M1805963/7627645597497165454103 : 37C3D2C4B6A1C3E2
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1805963/7627645597497165454103 : 37C3D2C4B6A1C3E2
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2013-07-14Chang Chia-TcheF-ECM
Factor: 7627645597497165454103
2011-02-10Carsten KossendeyNF-PM1
B1=100000, B2=1650000, E=6
2010-12-13GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-11Architects CubedNF
no factor from 2^60 to 2^61