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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MnStatusDetails
2801767Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
30441742502116071651.4old
ECM
DigitsB1Curves
255000080 / 280
Estimated T-Level: 21.4
TF below 2^66 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-21Oliver KruseA4983B4515CA009B148000353
Verified2017-12-07Chang Chia-TcheA4983B4515CA009B1127299653
History
DateUserTypeResult
2021-09-18Dylan DelgadoNF-PM1
B1=4000000, B2=404000000
2017-12-07Chang Chia-TcheC-PRP
M2801767/3044174250211607 : A4983B4515CA009B
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2801767/3044174250211607 : A4983B4515CA009B
PRP: Verified
PRP without proof (not generated)