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

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MnStatusDetails
1492649Factored
FactorDigitsBitsDate
532567190554429635592065.52014-09-19 00:38:04
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)Andreas Schiffler690333B4C293B4E60
Verified (Factored)1998-11-21Andreas Kassner690333B4C293B4E61023044
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron973876354180E49D1013
Verified2017-10-18Oliver Kruse973876354180E49D123181213
History
DateUserTypeResult
2022-03-08LordJuliusNF
no factor from 2^58 to 2^60
2017-10-18Oliver KruseC-PRP
M1492649/53256719055442963559 : 973876354180E49D
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1492649/53256719055442963559 : 973876354180E49D
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2014-09-19Chang Chia-TcheF-ECM
Factor: 53256719055442963559 / (ECM curve 1, B1=50000, B2=5000000)
2011-12-07markrNF-PM1
B1=275000, B2=6000000, E=12
2011-05-28GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-05-06Architects CubedNF
no factor from 2^60 to 2^61