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:





MnDetails
5091173
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 270
TF target 265
Factored
FactorDigitsBitsDate
122188153926.9old
162917537927.32008-09-08 01:26:25
18328222811030.82008-09-08 01:26:25
1622156671099486728960972477.12025-01-28 21:50:14
P-1 factors
DateFactorsB1B2
2025-01-28162215667109948672896097
36000008647769130
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Factored
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbk44E78D1407A594803013
Factored
PRP without proof (not generated)
2018-05-03storm551044E78D1407A594803195104713
Verified
Certified Good
2025-02-02mrhEC13DDB8122BD8CD413077353
History
DateUserTypeResult
2025-02-03DanMBCERT
Proof certified good
2025-02-02mrhC-PRPM5091173/122188153/162917537/1832822281/162215667109948672896097 : EC13DDB8122BD8CD
Proof Certified Good

Proof Power: 7

2025-01-28Sid & AndyF-PM1Factor: 162215667109948672896097 / B1=3600000, B2=8647769130
2025-01-23Sid & AndyNFno factor TF: 68-70
2023-05-11This -Anonymous-NF-PM1B1=50000, B2=1000000
2018-05-03storm5510C-PRPM5091173/122188153/162917537/1832822281 : 44E78D1407A59480
2017-09-20kkmrkkblmbrbkC-PRPM5091173/122188153/162917537/1832822281 : 44E78D1407A59480
2008-09-08Will EdgingtonFFactor: 1832822281
2008-09-08Will EdgingtonFFactor: 162917537