Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
2271151
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 262
Factored
FactorDigitsBitsDate
4232987631510231548.6old
3125058764330869131858.12015-08-11 11:52:45
974322441435632491810312376.42025-04-05 07:48:06
98438302891190846741481292583.02025-07-20 09:52:26
ECM
DigitsB1Curves
2550000280 / 280
30250000392 / 640
Estimated T-Level: 28.1 ⓘ
TF below 2^88 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
PRP without proof (not generated)
2017-10-11Oliver Kruse0EE8472E0CF354C92013
Factored
PRP without proof (not generated)
2017-11-21storm55100EE8472E0CF354C9282768813
Factored
Certified Good
2025-04-05featherA61C5ED5B355CE263139566853
Verified
Certified Good
2025-07-27ElysiaA61C5ED5B355CE264162730953
History
DateUserTypeResult
2025-07-27Terry KimCERT
Proof certified good
2025-07-27ElysiaC-PRPM2271151/423298763151023/312505876433086913/97432244143563249181031/9843830289119084674148129 : A61C5ED5B355CE26
Proof Certified Good

Proof Power: 7

2025-07-20TJAOIF-ECMFactor: 9843830289119084674148129 / ECM curve 6, B1=250000, B2=643227585, Edwards Sigma=8847819919910332
2025-04-05George WoltmanCERT
Proof certified good
2025-04-05featherC-PRPM2271151/423298763151023/312505876433086913/97432244143563249181031 : A61C5ED5B355CE26
Proof Certified Good

Proof Power: 7

2025-04-05featherF-ECMFactor: 97432244143563249181031 / ECM curve 5, B1=87390, B2=12970230, Edwards Sigma=2818843391149290
2017-11-21storm5510C-PRPM2271151/423298763151023/312505876433086913 : 0EE8472E0CF354C9
2017-10-11Oliver KruseC-PRPM2271151/423298763151023/312505876433086913 : 0EE8472E0CF354C9
2016-04-28alpertronNF-PM1B1=500000, B2=15000000, E=12
2015-08-11TJAOIFFactor: 312505876433086913