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

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MnStatusDetails
2499439Factored
FactorDigitsBitsDate
9908828194586794957272484972789.72020-10-25 04:21:29
ECM
DigitsB1Curves
255000085 / 280
Estimated T-Level: 21.5 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Dennis Bradford7DAAD5D563E3DAA50
Verified (Factored)1999-05-16Erez7DAAD5D563E3DAA5573216
Verified (Factored)2018-06-02kkmrkkblmbrbk7DAAD5D563E3DAA5280574
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-10-27arnaudD4E45392918543F01379953
History
DateUserTypeResult
2020-10-28Kevin JagetCERT
PRP Certification
Proof certified good
2020-10-27arnaudC-PRP
M2499439/990882819458679495727248497 : D4E45392918543F0
PRP proof power = 7
PRP: Verified
Proof certified good
2020-10-25nordiF-ECM
Factor: 990882819458679495727248497 / (ECM curve 6, B1=50000, B2=5000000, Sigma=4886843668031655)
2019-02-25TJAOINF
no factor from 2^67 to 2^68
2018-06-02kkmrkkblmbrbkC-LL
7DAAD5D563E3DAA5
2017-07-27Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-10-31ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2014-12-18mikrNF-PM1
B1=2382500, B2=85770100, E=12
2014-09-10JossNF-PM1
B1=120679
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-11Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-25Oscar ÖstlinNF-PM1
B1=95000, B2=1971250, E=6
2010-12-16JossNF-PM1
B1=20000
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61