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

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MnStatusDetails
1544891Factored
FactorDigitsBitsDate
2014551116952931778159832477.42016-04-14 11:54:53
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Lee Middle SchoolA20E479795F32A710
Verified (Factored)1998-10-25Ethan HansenA20E479795F32A71889783
Verified (Factored)2015-07-20MadPooA20E479795F32A711089584
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-01Oliver KruseA9566160387848041013
Verified2017-10-30kkmrkkblmbrbkA956616038784804126178913
History
DateUserTypeResult
2017-10-30kkmrkkblmbrbkC-PRP
M1544891/201455111695293177815983 : A956616038784804
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1544891/201455111695293177815983 : A956616038784804
PRP: Verified
PRP without proof (not generated)
2016-04-14VictordeHollanderF-ECM
Factor: 201455111695293177815983 / (ECM curve 75, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-11ramgeisNF
no factor from 2^65 to 2^66
2015-07-20MadPooC-LL
A20E479795F32A71
2015-03-09VictordeHollanderNF-PM1
B1=10000000, B2=200000000, E=12
2015-02-12snme2pm1NF
no factor from 2^64 to 2^65
2015-02-12snme2pm1NF
no factor from 2^63 to 2^64
2013-12-05David CampeauNF-PM1
B1=925000, B2=26825000, E=12
2010-05-24GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-29Architects CubedNF
no factor from 2^60 to 2^61