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

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MnStatusDetails
2863493Factored
FactorDigitsBitsDate
11219296446857743116836092579.92021-05-28 14:18:23
ECM
DigitsB1Curves
255000087 / 280
Estimated T-Level: 21.6
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-05-01Robert Mitchell57B12366CF4F742C0
Verified (Factored)2000-03-27Gustavo Felisberto57B12366CF4F742C1954934
Verified (Factored)2018-09-19kkmrkkblmbrbk57B12366CF4F742C134277
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-05-29Chad Steenerson E8BC7F97A5C42AC81201392853
History
DateUserTypeResult
2021-05-30curtiscCERT
PRP Certification
Proof certified good
2021-05-29Chad Steenerson C-PRP
M2863493/1121929644685774311683609 : E8BC7F97A5C42AC8
PRP proof power = 7
PRP: Verified
Proof certified good
2021-05-28kutensF-ECM
Factor: 1121929644685774311683609 / (ECM curve 7, B1=50000, B2=6750000, Sigma=4514364600141809)
2020-03-10masserNF-PM1
B1=5000000, B2=200000000, E=12
2019-10-24masserNF-PM1
B1=2870000, B2=28700000, E=12
2019-01-08chuenkitNF
no factor from 2^67 to 2^68
2018-09-19kkmrkkblmbrbkC-LL
57B12366CF4F742C
2017-11-12Gordon SpenceNF
no factor from 2^66 to 2^67
2017-08-22JossNF-PM1
B1=480000, B2=4800000, E=6
2017-08-19JossNF-PM1
B1=400000, B2=4000000, E=6
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-02-18ramgeisNF
no factor from 2^65 to 2^66
2015-05-10Squeeky_SquirrelNF-PM1
B1=200000, B2=5850000, E=12
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2014-04-24-Anonymous-NF-PM1
B1=100000
2014-04-19JossNF-PM1
B1=60000
2012-01-20lycornNF
no factor from 2^62 to 2^63
2012-01-20lycornNF
no factor from 2^61 to 2^62
2009-02-12Sturle SundeNF
no factor from 2^60 to 2^61