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

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MnStatusDetails
2398057Factored
FactorDigitsBitsDate
7384601648065497309292169.32020-03-31 23:25:41
ECM
DigitsB1Curves
255000037 / 280
Estimated T-Level: 20.7 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Simon Burge9EFCE17883BFD4610
Verified (Factored)Doug Fortune9EFCE17883BFD4610
BadChionh Wei PengED6EF25B4B7D5D390
Verified (Factored)2015-11-15MadPoo9EFCE17883BFD461533377
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-04-01Daniil Tsarkov3FEE418BC3C46A851134994553
Verified2020-04-02M Miller3FEE418BC3C46A851129313253
History
DateUserTypeResult
2020-04-02M MillerC-PRP
M2398057/738460164806549730929 : 3FEE418BC3C46A85
PRP: Verified
PRP without proof (not generated)
2020-04-01Daniil TsarkovC-PRP
M2398057/738460164806549730929 : 3FEE418BC3C46A85
PRP: Verified
PRP without proof (not generated)
2020-03-31KeysarecoolF-ECM
Factor: 738460164806549730929 / (ECM curve 2, B1=50000, B2=5000000, Sigma=8535613700802434)
2019-02-25TJAOINF
no factor from 2^67 to 2^68
2017-06-27Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-12-14mikrNF-PM1
B1=3000000, B2=100000000, E=12
2015-11-15MadPooC-LL
9EFCE17883BFD461
2015-11-05ramgeisNF
no factor from 2^65 to 2^66
2015-03-12VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-12VictordeHollanderNF
no factor from 2^63 to 2^64
2014-11-06JossNF-PM1
B1=143530
2014-08-21JossNF-PM1
B1=116765
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-06-02Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-23markrNF-PM1
B1=90000, B2=1845000, E=6
2010-11-16JossNF-PM1
B1=20000
2010-11-08JossNF-PM1
B1=15000
2009-01-16Sturle SundeNF
no factor from 2^60 to 2^61