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
284857Factored
FactorDigitsBitsDate
13673137823.7old
602603837427298391755.72014-08-22 10:16:01
63428301782876893418894422332892.42020-11-03 00:59:49
ECM
DigitsB1Curves
2550000280 / 280
30250000511 / 640
Estimated T-Level: 29.0
TF below 2^91 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse606056EB2AB9AA7A2013
Verified (Factored)2017-10-13kkmrkkblmbrbk606056EB2AB9AA7A25715713
Verified (Factored)2020-04-17Oliver KruseB8E65D488DB4184B28114753
Verified2020-11-03mnd9B8E65D488DB4184B312066653
Verified2020-11-05Sébastien BROUCKEB8E65D488DB4184B327220953
History
DateUserTypeResult
2023-02-16USAFSSNF-PM1
B1=4000000, B2=22109179950
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-11-06curtiscCERT
PRP Certification
Proof certified good
2020-11-05Sébastien BROUCKEC-PRP
M284857/13673137/60260383742729839/6342830178287689341889442233 : B8E65D488DB4184B
PRP: Verified
PRP without proof (small exponent)
2020-11-03mnd9C-PRP
M284857/13673137/60260383742729839/6342830178287689341889442233 : B8E65D488DB4184B
PRP proof power = 5
PRP: Verified
Proof certified good
2020-11-03_p95holder_F-ECM
Factor: 6342830178287689341889442233 / (ECM curve 1, B1=250000, B2=25000000)
2020-04-17Oliver KruseC-PRP
M284857/13673137/60260383742729839 : B8E65D488DB4184B
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M284857/13673137/60260383742729839 : 606056EB2AB9AA7A
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M284857/13673137/60260383742729839 : 606056EB2AB9AA7A
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M284857/13673137/60260383742729839 : 606056EB2AB9AA7A
PRP without proof (not generated)
2014-08-22TJAOIF-ECM
Factor: 60260383742729839