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

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MnStatusDetails
2598259Factored
FactorDigitsBitsDate
5153665983532174648312168.82020-07-02 16:07:57
ECM
DigitsB1Curves
255000035 / 280
Estimated T-Level: 20.6 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Harold ClementEB2E005B045C484A0
Verified (Factored)1999-07-27Yuri SorkinEB2E005B045C484A1557082
Verified (Factored)2018-06-25kkmrkkblmbrbkEB2E005B045C484A1622401
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-02riccardo uberti58538A0F8A866B731159960153
Verified2020-07-03marssystems58538A0F8A866B73118829453
History
DateUserTypeResult
2020-07-03marssystemsC-PRP
M2598259/515366598353217464831 : 58538A0F8A866B73
PRP: Verified
PRP without proof (not generated)
2020-07-02riccardo ubertiC-PRP
M2598259/515366598353217464831 : 58538A0F8A866B73
PRP: Verified
PRP without proof (not generated)
2020-07-02GANF-ECM
Factor: 515366598353217464831 / (ECM curve 2, B1=50000, B2=5000000, Sigma=4809882184802521)
2019-03-11TJAOINF
no factor from 2^67 to 2^68
2018-06-25kkmrkkblmbrbkC-LL
EB2E005B045C484A
2017-08-21Gordon SpenceNF
no factor from 2^66 to 2^67
2016-08-31mikrNF-PM1
B1=3200000, B2=112000000, E=12
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-11-05ramgeisNF
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
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-23Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-04-18James HeinrichNF-PM1
B1=175000, B2=4156250, E=6
2011-01-15JossNF-PM1
B1=50000
2010-11-16JossNF-PM1
B1=20000
2009-01-30Sturle SundeNF
no factor from 2^60 to 2^61