Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1955827Factored
FactorDigitsBitsDate
245808337371134.5old
67286120698311342.62008-07-15 07:48:40
36585453773524531872892271.62022-06-01 10:40:47
158937928049109603624412373.82021-02-26 17:24:17
ECM
DigitsB1Curves
2550000275 / 280
Estimated T-Level: 24.9
TF below 2^78 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-05Oliver KruseD2EBF296F88829252013
Verified (Factored)2017-11-11kkmrkkblmbrbkD2EBF296F8882925296411013
Verified (Factored)2021-02-26SRJ28779FA87DA0143C9DBB366599253
Verified2022-06-07XZT9FA87DA0143C9DBB4152798753
History
DateUserTypeResult
2022-06-07OLAFECERT
PRP Certification
Proof certified good
2022-06-07XZTC-PRP
M1955827/24580833737/6728612069831/15893792804910960362441/3658545377352453187289 : 9FA87DA0143C9DBB
PRP proof power = 7
PRP: Verified
Proof certified good
2022-06-01TJAOIF-ECM
Factor: 3658545377352453187289 / (ECM curve 72, B1=50000, B2=7500000)
2021-02-26ChuckCERT
PRP Certification
Proof certified good
2021-02-26SRJ2877C-PRP
M1955827/24580833737/6728612069831/15893792804910960362441 : 9FA87DA0143C9DBB
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2021-02-26_p95holder_F-ECM
Factor: 15893792804910960362441 / (ECM curve 1, B1=50000, B2=5000000)
2017-11-11kkmrkkblmbrbkC-PRP
M1955827/24580833737/6728612069831 : D2EBF296F8882925
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1955827/24580833737/6728612069831 : D2EBF296F8882925
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 6728612069831