Marin Mersenne 2^P-1
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MnStatusDetails
3197707Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
639359482030575174762509532685.72021-05-07 02:07:11
ECM
DigitsB1Curves
255000048 / 280
Estimated T-Level: 20.9 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)C. Cooper / S. Boone8A894AE87AB454990
Verified (Factored)1999-05-30BitBucket8A894AE87AB454991266037
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-05-08kutensA17BF17FC8DB1C1A1200855453
History
DateUserTypeResult
2022-09-12JossNF-PM1
B1=1000000, B2=241175550
2022-03-10JossNF-PM1
B1=1000000, B2=134343300
2021-05-08Ben DeloCERT
PRP Certification
Proof certified good
2021-05-08kutensC-PRP
M3197707/63935948203057517476250953 : A17BF17FC8DB1C1A
PRP proof power = 7
PRP: Verified
Proof certified good
2021-05-07ZenzomaF-ECM
Factor: 63935948203057517476250953 / (ECM curve 5, B1=50000, B2=5000000, Sigma=5968989112110376)
2019-11-28mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-12-17TJAOINF
no factor from 2^67 to 2^68
2018-07-03JossNF-PM1
B1=430000, B2=4300000, E=6
2017-04-30Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-21ThaNF
no factor from 2^65 to 2^66
2015-02-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-15VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-06Squeeky_SquirrelNF-PM1
B1=215000, B2=6235000, E=12
2013-01-03dbaughNF
no factor from 2^62 to 2^63
2011-10-11Grant McCrackenNF
no factor from 2^61 to 2^62
2009-04-07S485122NF
no factor from 2^60 to 2^61