Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:





MnDetails
5048221
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 270
TF target 265
Factored
FactorDigitsBitsDate
15889679455191340.5old
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
Verified
PRP without proof (not generated)
2017-11-22storm551043F244E889E8D2271350297453
Verified
PRP without proof (not generated)
2018-01-18kkmrkkblmbrbk43F244E889E8D2271415862653
History
DateUserTypeResult
2025-01-18Sid & AndyNF-PM1B1=6000000, B2=6348337380
2025-01-10Sid & AndyNFno factor TF: 68-70
2023-05-11This -Anonymous-NF-PM1B1=50000, B2=1000000
2018-01-18kkmrkkblmbrbkC-PRPM5048221/1588967945519 : 43F244E889E8D227
2017-11-22storm5510C-PRPM5048221/1588967945519 : 43F244E889E8D227