Marin Mersenne 2^P-1
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MnStatusDetails
2784167Factored
FactorDigitsBitsDate
4901934852716908800072168.72021-02-03 18:29:33
ECM
DigitsB1Curves
255000074 / 280
Estimated T-Level: 21.3
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Petri Holopainen6E5B1A83B0D671BD0
Verified (Factored)1999-04-23Duke Ionescu6E5B1A83B0D671BD357430
Verified (Factored)2018-08-26kkmrkkblmbrbk6E5B1A83B0D671BD690666
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-02-03riccardo uberti9C2F03C0807C4782113033753
History
DateUserTypeResult
2021-02-03riccardo ubertiCERT
PRP Certification
Proof certified good
2021-02-03riccardo ubertiC-PRP
M2784167/490193485271690880007 : 9C2F03C0807C4782
PRP proof power = 7
PRP: Verified
Proof certified good
2021-02-03mnd9F-ECM
Factor: 490193485271690880007 / (ECM curve 6, B1=50000, B2=5000000, Sigma=1481498326806044)
2019-11-15BigBrotherNF-PM1
B1=3000000, B2=90000000, E=12
2019-02-25chuenkitNF
no factor from 2^67 to 2^68
2018-08-26kkmrkkblmbrbkC-LL
6E5B1A83B0D671BD
2017-10-19Gordon SpenceNF
no factor from 2^66 to 2^67
2017-07-20JossNF-PM1
B1=400000, B2=4000000, E=6
2016-05-02JossNF-PM1
B1=200000, B2=3600000, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-08ramgeisNF
no factor from 2^65 to 2^66
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-28JossNF-PM1
B1=123053
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-03-08Grant McCrackenNF
no factor from 2^61 to 2^62
2010-11-25markrNF-PM1
B1=100000, B2=2075000, E=6
2010-11-11JossNF-PM1
B1=15000
2009-01-28Sturle SundeNF
no factor from 2^60 to 2^61