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
1679501Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
13436009823.7old
77916720402791342.82008-07-15 07:45:14
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02KrieselC270118B04335022013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron38FFD7A34B0751612013
Verified2017-10-18Oliver Kruse38FFD7A34B0751612114547413
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
C270118B04335022
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-10-18Oliver KruseC-PRP
M1679501/13436009/7791672040279 : 38FFD7A34B075161
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1679501/13436009/7791672040279 : 38FFD7A34B075161
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 7791672040279