Marin Mersenne 2^P-1
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Finding World Record Primes Since 1996

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MnStatusDetails
2422873Factored
FactorDigitsBitsDate
11938972427036232161272270.02020-09-10 05:56:54
ECM
DigitsB1Curves
255000081 / 280
Estimated T-Level: 21.4 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Lloyd6DAE836A09936A520
Verified (Factored)1999-04-13David Underbakke6DAE836A09936A522196210
Verified (Factored)2018-05-20kkmrkkblmbrbk6DAE836A09936A522091089
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-09-10M MillerE71D54E5CABC550C185443753
History
DateUserTypeResult
2020-09-10GregCERT
PRP Certification
Proof certified good
2020-09-10M MillerC-PRP
M2422873/1193897242703623216127 : E71D54E5CABC550C
PRP proof power = 7
PRP: Verified
Proof certified good
2020-09-10MarkSF-ECM
Factor: 1193897242703623216127 / (ECM curve 5, B1=50000, B2=5000000, Sigma=1417148942255108)
2019-04-29TJAOINF
no factor from 2^67 to 2^68
2018-05-20kkmrkkblmbrbkC-LL
6DAE836A09936A52
2017-07-05Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-10-23ramgeisNF
no factor from 2^65 to 2^66
2015-02-27VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-27VictordeHollanderNF
no factor from 2^63 to 2^64
2014-04-16mikrNF-PM1
B1=1986400, B2=69524000, E=12
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-06-04Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-24Oscar ÖstlinNF-PM1
B1=95000, B2=1923750, E=6
2010-11-14Oscar ÖstlinNF-PM1
B1=75011
2009-01-14Sturle SundeNF
no factor from 2^60 to 2^61