Marin Mersenne 2^P-1
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MnStatusDetails
2571269Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
164652146328168749751592373.82021-03-06 08:45:32
ECM
DigitsB1Curves
2550000101 / 280
Estimated T-Level: 21.8 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)William H. Geiger3F175C18FAE4D2680
Verified (Factored)1999-05-02Ben Ng3F175C18FAE4D268490795
Verified (Factored)2018-06-16kkmrkkblmbrbk3F175C18FAE4D2681808814
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-03-07Chang Chia-TcheBEB36F2CC133F61219486853
History
DateUserTypeResult
2021-03-07Ben DeloCERT
PRP Certification
Proof certified good
2021-03-07Chang Chia-TcheC-PRP
M2571269/16465214632816874975159 : BEB36F2CC133F612
PRP proof power = 7
PRP: Verified
Proof certified good
2021-03-06IanGlencrossF-ECM
Factor: 16465214632816874975159 / (ECM curve 2, B1=50000, B2=5000000)
2019-09-06YxinityNF
no factor from 2^67 to 2^68
2018-06-16kkmrkkblmbrbkC-LL
3F175C18FAE4D268
2017-08-13Gordon SpenceNF
no factor from 2^66 to 2^67
2016-06-12mikrNF-PM1
B1=3200000, B2=112000000, E=12
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-08ramgeisNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-19Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-04-16James HeinrichNF-PM1
B1=175000, B2=4112500, E=6
2011-01-10JossNF-PM1
B1=50000
2010-12-21JossNF-PM1
B1=20000
2009-01-30Sturle SundeNF
no factor from 2^60 to 2^61