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
2228981Factored
FactorDigitsBitsDate
13373887823.7old
43604690933296880344972271.92022-08-10 13:43:45
ECM
DigitsB1Curves
255000084 / 280
Estimated T-Level: 21.5
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-09Oliver Kruse6D326F86C5BB9C591013
Verified (Factored)2017-11-20kkmrkkblmbrbk6D326F86C5BB9C591155949313
Verified2022-08-11Cong Shengzhuo7EDD9A5891706D24279981653
History
DateUserTypeResult
2022-08-11Jason VK4FJGSCERT
PRP Certification
Proof certified good
2022-08-11Cong ShengzhuoC-PRP
M2228981/13373887/4360469093329688034497 : 7EDD9A5891706D24
PRP proof power = 7
PRP: Verified
Proof certified good
2022-08-10_p95holder_F-ECM
Factor: 4360469093329688034497 / (ECM curve 3, B1=50000, B2=5000000)
2017-11-20kkmrkkblmbrbkC-PRP
M2228981/13373887 : 6D326F86C5BB9C59
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-09Oliver KruseC-PRP
M2228981/13373887 : 6D326F86C5BB9C59
PRP: Verified (Factored)
PRP without proof (not generated)
2016-04-09alpertronNF-PM1
B1=500000, B2=15000000, E=12