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

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MnStatusDetails
2138569Factored
FactorDigitsBitsDate
2768693380444105760721592477.92013-04-21 07:07:15
ECM
DigitsB1Curves
2550000183 / 280
Estimated T-Level: 23.3
TF below 2^72 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Robert FribergC3D0B6A194F351010
Verified (Factored)1999-02-14Kent LeeC3D0B6A194F351011816346
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-08Oliver Kruse350424152275FB131013
Verified2017-11-18kkmrkkblmbrbk350424152275FB13113286513
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2017-11-18kkmrkkblmbrbkC-PRP
M2138569/276869338044410576072159 : 350424152275FB13
PRP: Verified
PRP without proof (not generated)
2017-10-08Oliver KruseC-PRP
M2138569/276869338044410576072159 : 350424152275FB13
PRP: Verified
PRP without proof (not generated)
2016-03-27alpertronNF-PM1
B1=500000, B2=15000000, E=12
2013-04-21XyzzyF-ECM
Factor: 276869338044410576072159
2013-02-21dbaughNF
no factor from 2^62 to 2^63
2012-04-16Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-11-27Oscar ÖstlinNF-PM1
B1=80000, B2=1500000, E=6
2010-10-26Oscar ÖstlinNF-PM1
B1=75011
2009-01-04Sturle SundeNF
no factor from 2^60 to 2^61