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
1712177Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
10273063823.3old
65062727826.02008-07-15 07:45:40
11137190735440028220412269.92015-05-31 12:52:12
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 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)2025-09-02KrieselDDA8F706C73C9593013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertronF4521BFA1AECFB373013
Verified2017-10-18Oliver KruseF4521BFA1AECFB373149705713
P-1 factors
DateFactorB1B2
2015-05-31111371907354400282204150000015000000
History
DateUserTypeResult
2025-09-03PoaoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
DDA8F706C73C9593
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-10-18Oliver KruseC-PRP
M1712177/10273063/65062727/1113719073544002822041 : F4521BFA1AECFB37
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1712177/10273063/1113719073544002822041/65062727 : F4521BFA1AECFB37
PRP: Verified
PRP without proof (not generated)
2015-05-31alpertronF-PM1
Factor: 1113719073544002822041 / (P-1, B1=500000, B2=15000000, E=12)
2008-07-15J FeitsmaF
Factor: 65062727