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
261251Factored
FactorDigitsBitsDate
319844336623280871754.8old
52304915432475248799982840500929814476939128.62022-05-03 22:48:25
ECM
DigitsB1Curves
2550000280 / 280
30250000417 / 640
Estimated T-Level: 28.3
TF below 2^89 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse2AD8A87784A7976E1013
Verified (Factored)2017-10-12Oliver Kruse2AD8A87784A7976E112609113
Verified (Factored)2017-11-06kkmrkkblmbrbk2AD8A87784A7976E111982913
Verified (Factored)2020-04-17Oliver KruseEDD9D2C3B5C5B704113995153
Verified2022-05-03LordJuliusEDD9D2C3B5C5B70429799153
Verified2022-05-04Oliver KruseEDD9D2C3B5C5B704224859053
P-1 factors
DateFactorB1B2
2022-05-035230491543247524879998284050092981447693000000010035812696910
History
DateUserTypeResult
2022-05-04Mr. MetricCERT
PRP Certification
Proof certified good
2022-05-04Oliver KruseC-PRP
M261251/31984433662328087/523049154324752487999828405009298144769 : EDD9D2C3B5C5B704
PRP proof power = 5
PRP: Verified
Proof certified good
2022-05-04curtiscCERT
PRP Certification
Proof certified good
2022-05-03LordJuliusC-PRP
M261251/31984433662328087/523049154324752487999828405009298144769 : EDD9D2C3B5C5B704
PRP proof power = 5
PRP: Verified
Proof certified good
2022-05-03Oliver KruseF-PM1
Factor: 523049154324752487999828405009298144769 / (P-1, B1=30000000, B2=10035812696910)
2021-09-15Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M261251/31984433662328087 : EDD9D2C3B5C5B704
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M261251/31984433662328087 : 2AD8A87784A7976E
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M261251/31984433662328087 : 2AD8A87784A7976E
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M261251/31984433662328087 : 2AD8A87784A7976E
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M261251/31984433662328087 : 2AD8A87784A7976E
PRP without proof (not generated)