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
9875087Factored
FactorDigitsBitsDate
55300487211032.4old
4413176380311238.72008-09-08 05:37:27
43022297255921165991882072581.82022-08-19 11:15:39
ECM
DigitsB1Curves
255000067 / 280
Estimated T-Level: 21.2 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2020-09-16riccardo ubertiC75F5CE0E7759B4D243741153
Verified (Factored)2021-02-10Oliver KruseC75F5CE0E7759B4D2693676053
Verified2022-08-19riccardo ubertiC75F5CE0E7759B4D3266918853
History
DateUserTypeResult
2022-08-19Chad Steenerson CERT
PRP Certification
Proof certified good
2022-08-19riccardo ubertiC-PRP
M9875087/5530048721/441317638031/4302229725592116599188207 : C75F5CE0E7759B4D
PRP proof power = 8
PRP: Verified
Proof certified good
2022-08-19riccardo ubertiF-PP1
Start=6/5, B1=2300000, B2=60000000, Factor: 4302229725592116599188207
2022-08-15riccardo ubertiNF-PP1
Start=2/7, B1=2000000, B2=50000000
2021-02-10workerthreadCERT
PRP Certification
Proof certified good
2021-02-10Oliver KruseC-PRP
M9875087/5530048721/441317638031 : C75F5CE0E7759B4D
PRP proof power = 8
PRP: Verified (Factored)
Proof certified good
2020-09-16riccardo ubertiC-PRP
M9875087/5530048721/441317638031 : C75F5CE0E7759B4D
PRP: Verified (Factored)
PRP without proof (not generated)
2008-09-08Will EdgingtonF
Factor: 441317638031