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

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MnStatusDetails
2347727Factored
FactorDigitsBitsDate
44965881574037083536097932581.92020-06-22 10:10:42
ECM
DigitsB1Curves
255000061 / 280
Estimated T-Level: 21.1
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David LintonCD3FCB35DBBCA2CE0
Verified (Factored)Joakim RosqvistCD3FCB35DBBCA2CE0
Verified (Factored)1999-03-01challengeCD3FCB35DBBCA2CE2064308
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-06-22Christoph Zenger5F836B21335ABE031112907453
Verified2020-06-22M Miller5F836B21335ABE03177662553
History
DateUserTypeResult
2020-06-22M MillerC-PRP
M2347727/4496588157403708353609793 : 5F836B21335ABE03
PRP: Verified
PRP without proof (not generated)
2020-06-22Christoph ZengerC-PRP
M2347727/4496588157403708353609793 : 5F836B21335ABE03
PRP: Verified
PRP without proof (not generated)
2020-06-22mnd9F-ECM
Factor: 4496588157403708353609793 / (ECM curve 1, B1=50000, B2=5000000, Sigma=2852933347243976)
2019-03-04TJAOINF
no factor from 2^67 to 2^68
2018-01-30Sid & AndyNF-PM1
B1=6000000, B2=180000000, E=12
2017-06-10Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-10-27ramgeisNF
no factor from 2^65 to 2^66
2015-03-06VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-06VictordeHollanderNF
no factor from 2^63 to 2^64
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-05-29Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-03-05BudNF-PM1
B1=500000, B2=10000000, E=12
2009-01-16Sturle SundeNF
no factor from 2^60 to 2^61