Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1550663Factored
FactorDigitsBitsDate
91231471988591339670172273.02016-03-02 12:43:57
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)Rich Harms5EB83518237376940
Verified (Factored)1998-11-07Anders Neld5EB8351823737694912511
Verified (Factored)2015-07-20MadPoo5EB8351823737694287286
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-01Oliver Kruse7C517AE2FB45E8DF1013
Verified2017-10-30ATH7C517AE2FB45E8DF1100799013
History
DateUserTypeResult
2017-10-30ATHC-PRP
M1550663/9123147198859133967017 : 7C517AE2FB45E8DF
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1550663/9123147198859133967017 : 7C517AE2FB45E8DF
PRP: Verified
PRP without proof (not generated)
2016-03-02bamF-ECM
Factor: 9123147198859133967017 / (ECM curve 3, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
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
5EB8351823737694
2015-03-25VictordeHollanderNF-PM1
B1=10000000, B2=200000000, E=12
2015-02-16snme2pm1NF
no factor from 2^64 to 2^65
2015-02-16snme2pm1NF
no factor from 2^63 to 2^64
2013-12-08David CampeauNF-PM1
B1=945000, B2=27405000, E=12
2011-02-04James HeinrichNF-PM1
B1=80000, B2=1360000, E=6
2010-06-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-29Architects CubedNF
no factor from 2^60 to 2^61