Marin Mersenne 2^P-1
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MnStatusDetails
2947729Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
4262812105441602851772168.52020-12-18 17:24:11
ECM
DigitsB1Curves
255000042 / 280
Estimated T-Level: 20.8 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Paul BeckerCEC5DA5FE5B19E800
Verified (Factored)1999-09-22Brian J. BeesleyCEC5DA5FE5B19E802526194
Verified (Factored)2018-10-12kkmrkkblmbrbkCEC5DA5FE5B19E802455237
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-12-19Niels_Mache_Nextcloud36D3DE35FCDAB4D21251359853
History
DateUserTypeResult
2020-12-19curtiscCERT
PRP Certification
Proof certified good
2020-12-19Niels_Mache_NextcloudC-PRP
M2947729/426281210544160285177 : 36D3DE35FCDAB4D2
PRP proof power = 7
PRP: Verified
Proof certified good
2020-12-18lycornF-ECM
Factor: 426281210544160285177 / (ECM curve 3, B1=50000, B2=5000000, Sigma=5691360785280634)
2018-12-24chuenkitNF
no factor from 2^67 to 2^68
2018-10-12kkmrkkblmbrbkC-LL
CEC5DA5FE5B19E80
2017-11-28Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-25ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-04-30VictordeHollanderNF-PM1
B1=1000000, B2=20000000, E=12
2015-04-27VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-27VictordeHollanderNF
no factor from 2^63 to 2^64
2014-11-06JossNF-PM1
B1=116774
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-12-14Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-11-04markrNF-PM1
B1=95000, B2=1971250, E=6
2009-02-13Sturle SundeNF
no factor from 2^60 to 2^61