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

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MnStatusDetails
1988843Factored
FactorDigitsBitsDate
848270803656016941048492376.22017-10-20 15:33:30
ECM
DigitsB1Curves
2550000280 / 280
3025000058 / 640
Estimated T-Level: 25.5 ⓘ
TF below 2^80 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Thomas HonoldF9A1756B5A11CBE80
Verified (Factored)Edesio Costa e SilvaF9A1756B5A11CBE80
Verified (Factored)1999-01-17Lon GreenF9A1756B5A11CBE81887350
Verified (Factored)2016-06-02MadPooF9A1756B5A11CBE8732657
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-21Oliver KruseFBEE01F27A4C04FB137178753
Verified2017-10-21Yaroslav BerezhkoFBEE01F27A4C04FB1147639253
History
DateUserTypeResult
2017-10-21Yaroslav BerezhkoC-PRP
M1988843/84827080365601694104849 : FBEE01F27A4C04FB
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M1988843/84827080365601694104849 : FBEE01F27A4C04FB
PRP: Verified
PRP without proof (not generated)
2017-10-20ConductorF-ECM
Factor: 84827080365601694104849 / (ECM curve 2, B1=50000, B2=5000000)
2017-09-29TJAOINF
no factor from 2^66 to 2^67
2016-06-02MadPooC-LL
F9A1756B5A11CBE8
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-09-12ramgeisNF
no factor from 2^65 to 2^66
2015-03-08lycornNF
no factor from 2^64 to 2^65
2015-03-08lycornNF
no factor from 2^63 to 2^64
2011-07-01GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-01-30kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2009-12-13S485122NF
no factor from 2^60 to 2^61