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
9873131Factored
FactorDigitsBitsDate
770104218011136.2old
21793361918105511651.02014-06-12 11:41:19
154231029864062870666412373.72022-07-10 11:29:01
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)2020-09-01riccardo uberti8A88E8D7BFA0293B2245554653
Verified (Factored)2021-02-09Oliver Kruse8A88E8D7BFA0293B2959054853
Verified2022-07-10riccardo uberti8A88E8D7BFA0293B3551926753
History
DateUserTypeResult
2022-07-11riccardo ubertiNF-PP1
Start=6/5, B1=2300000, B2=60000000
2022-07-11curtiscCERT
PRP Certification
Proof certified good
2022-07-10riccardo ubertiC-PRP
M9873131/77010421801/2179336191810551/15423102986406287066641 : 8A88E8D7BFA0293B
PRP proof power = 8
PRP: Verified
Proof certified good
2022-07-10riccardo ubertiF-PP1
Start=2/7, B1=2000000, B2=50000000, Factor: 15423102986406287066641
2021-02-09Chad Steenerson CERT
PRP Certification
Proof certified good
2021-02-09Oliver KruseC-PRP
M9873131/77010421801/2179336191810551 : 8A88E8D7BFA0293B
PRP proof power = 8
PRP: Verified (Factored)
Proof certified good
2020-09-01riccardo ubertiC-PRP
M9873131/77010421801/2179336191810551 : 8A88E8D7BFA0293B
PRP: Verified (Factored)
PRP without proof (not generated)
2014-06-12TJAOIF
Factor: 2179336191810551