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

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MnStatusDetails
2386283Factored
FactorDigitsBitsDate
1860360826577655665204872477.32020-07-24 13:14:50
ECM
DigitsB1Curves
255000072 / 280
Estimated T-Level: 21.3 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Len BaileyD86AE9F2897635C30
Verified (Factored)1999-03-15C. Cooper / S. BooneD86AE9F2897635C31759422
Verified (Factored)2018-05-16kkmrkkblmbrbkD86AE9F2897635C3631269
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-24mrh10A3BFD2EF6CA8211178109853
Verified2020-07-25pew10A3BFD2EF6CA821162898953
History
DateUserTypeResult
2020-07-25pewC-PRP
M2386283/186036082657765566520487 : 10A3BFD2EF6CA821
PRP: Verified
PRP without proof (not generated)
2020-07-24mrhC-PRP
M2386283/186036082657765566520487 : 10A3BFD2EF6CA821
PRP: Verified
PRP without proof (not generated)
2020-07-24GANF-ECM
Factor: 186036082657765566520487 / (ECM curve 3, B1=50000, B2=5000000, Sigma=3480198207926289)
2019-03-18TJAOINF
no factor from 2^67 to 2^68
2018-05-16kkmrkkblmbrbkC-LL
D86AE9F2897635C3
2017-06-23Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-04mikrNF-PM1
B1=3000000, B2=100000000, E=12
2015-11-01ramgeisNF
no factor from 2^65 to 2^66
2015-03-09VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-09VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-15-Anonymous-NF-PM1
B1=126897
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-06-01Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-26markrNF-PM1
B1=100000, B2=2075000, E=6
2010-11-15JossNF-PM1
B1=20000
2010-11-08JossNF-PM1
B1=15000
2009-01-14Sturle SundeNF
no factor from 2^60 to 2^61