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

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MnStatusDetails
2605741Factored
FactorDigitsBitsDate
17454872199449869334477832580.52020-07-30 09:29:40
ECM
DigitsB1Curves
255000046 / 280
Estimated T-Level: 20.8
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Louis Towles9D871527A8643DE40
Verified (Factored)1999-03-26Peter Sagi9D871527A8643DE42491952
Verified (Factored)2018-06-27kkmrkkblmbrbk9D871527A8643DE4793512
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-07-30M Miller0CB989606A4A59C11114659053
Verified2020-07-31marssystems0CB989606A4A59C11159716853
History
DateUserTypeResult
2020-07-31marssystemsC-PRP
M2605741/1745487219944986933447783 : 0CB989606A4A59C1
PRP: Verified
PRP without proof (not generated)
2020-07-30M MillerC-PRP
M2605741/1745487219944986933447783 : 0CB989606A4A59C1
PRP: Verified
PRP without proof (not generated)
2020-07-30rextheruntF-ECM
Factor: 1745487219944986933447783 / (ECM curve 1, B1=50000, B2=5000000)
2019-12-04BigBrotherNF-PM1
B1=3000000, B2=90000000, E=12
2019-12-03masserNF-PM1
B1=2000000, B2=50000000, E=12
2019-05-13TJAOINF
no factor from 2^67 to 2^68
2018-06-27kkmrkkblmbrbkC-LL
9D871527A8643DE4
2017-08-24Gordon SpenceNF
no factor from 2^66 to 2^67
2017-07-10JossNF-PM1
B1=400000, B2=4000000, E=6
2016-05-17JossNF-PM1
B1=200000, B2=3600000, E=6
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-01-15ramgeisNF
no factor from 2^65 to 2^66
2015-02-18VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-18VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-10JossNF-PM1
B1=124632
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-24Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-16markrNF-PM1
B1=100000, B2=2125000, E=6
2010-11-16JossNF-PM1
B1=20000
2009-01-27Sturle SundeNF
no factor from 2^60 to 2^61