Marin Mersenne 2^P-1
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MnStatusDetails
2364881Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
816261329812716989292066.12015-09-08 01:02:17
ECM
DigitsB1Curves
2550000227 / 280
Estimated T-Level: 24.1 ⓘ
TF below 2^75 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Lloyd8E931742E051F2620
Verified (Factored)1999-07-04Carl Mikkelsen8E931742E051F262296836
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertronDA41AA0BB1479D1C1013
Verified2017-11-01Oliver KruseDA41AA0BB1479D1C1100105913
P-1 factors
DateFactorB1B2
2015-09-08816261329812716989293000000100000000
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2018-04-27alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-01Oliver KruseC-PRP
M2364881/81626132981271698929 : DA41AA0BB1479D1C
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2364881/81626132981271698929 : DA41AA0BB1479D1C
PRP: Verified
PRP without proof (not generated)
2015-09-08mikrF-PM1
Factor: 81626132981271698929 / (P-1, 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=127141
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-05-30Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-31markrNF-PM1
B1=100000, B2=2025000, E=6
2010-11-03JossNF-PM1
B1=20000
2009-01-16Sturle SundeNF
no factor from 2^60 to 2^61