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
1717337Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
41216089825.3old
178603049927.42008-07-15 07:45:43
21947566871031.02008-07-15 07:45:43
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)2025-09-02Kriesel5EA2C9DA6A93C3D5013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron074DCE6A9ACB1A1A3013
Verified2017-10-19Oliver Kruse074DCE6A9ACB1A1A329985913
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
5EA2C9DA6A93C3D5
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-10-19Oliver KruseC-PRP
M1717337/41216089/178603049/2194756687 : 074DCE6A9ACB1A1A
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1717337/178603049/2194756687/41216089 : 074DCE6A9ACB1A1A
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 2194756687
2008-07-15J FeitsmaF
Factor: 178603049