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
228479Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
456959618.8old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000219 / 1566
Estimated T-Level: 30.7
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse08B3E100257751951013
Verified2017-10-12kkmrkkblmbrbk08B3E10025775195114353513
Verified2020-04-17Oliver Kruse45662028E3DF911A117332153
Verified2022-05-12Jorge Coveiro45662028E3DF911A18029453
Verified2024-12-30kkmrkkblmbrbk45662028E3DF911A115844053
History
DateUserTypeResult
2024-12-30Torchwood InstituteCERT
PRP Certification
Proof certified good
2024-12-30kkmrkkblmbrbkC-PRP
M228479/456959 : 45662028E3DF911A
PRP proof power = 5
PRP: Verified
Proof certified good
2022-05-12Jorge CoveiroC-PRP
M228479/456959 : 45662028E3DF911A
PRP proof power = 5
PRP: Verified
PRP proof never uploaded
2022-03-19Oliver KruseNF-PM1
B1=30000000, B2=10070832992220
2021-06-21Oliver KruseNF-PM1
B1=30000000, B2=3000000000
2020-04-17Oliver KruseC-PRP
M228479/456959 : 45662028E3DF911A
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M228479/456959 : 08B3E10025775195
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M228479/456959 : 08B3E10025775195
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M228479/456959 : 08B3E10025775195
PRP without proof (not generated)