Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
6974809Factored
FactorDigitsBitsDate
162015258245232566638852181832993.72024-02-21 13:21:49
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-08-07Marco BodratoDA9A9E49BEB426875150027
Bad2001-10-20Ing. Pavel PaJaSoft Janousek191C312E426CCADF4905540
Verified (Factored)2002-05-18Stephen WoodDA9A9E49BEB42687863304
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2024-02-21Jason Lynch7A520913B01145271373752053
P-1 factors
DateFactorB1B2
2024-02-211620152582452325666388521818314312000131423201910
History
DateUserTypeResult
2024-02-21Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-21Jason LynchC-PRP
M6974809/16201525824523256663885218183 : 7A520913B0114527
PRP proof power = 8
PRP: Verified
Proof certified good
2024-02-21Jason LynchF-PM1
Factor: 16201525824523256663885218183 / (P-1, B1=14312000, B2=131423201910)
2021-11-22Seth_TrNF-PM1
B1=4000000, B2=110000000, E=12
2021-09-28SRBaseNF
no factor from 2^71 to 2^72
2021-09-06SRBaseNF
no factor from 2^70 to 2^71
2021-08-08takahashiNF
no factor from 2^69 to 2^70
2020-04-24TJAOINF
no factor from 2^68 to 2^69
2020-01-29takahashiNF-PM1
B1=600000, B2=12000000, E=12
2018-02-26-Anonymous-NF
no factor from 2^67 to 2^68
2016-04-26Gordon SpenceNF
no factor from 2^66 to 2^67
2015-07-03VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-15lycornNF
no factor from 2^64 to 2^65
2014-02-09NesowaNF
no factor from 2^63 to 2^64
2011-12-07James HeinrichNF-PM1
B1=135000, B2=2835000, E=6