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
1596377Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
30664298632072840091961.42010-03-27 16:58:15
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.
LL
StatusDateUserResidueShift
Verified (Factored)Guy Paquet3ED88F5D7444DC6B0
Verified (Factored)1998-12-21Lars Lindley3ED88F5D7444DC6B984038
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02KrieselAFB9270587B11DDF013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-02Oliver Kruse215814FB0C3138911013
Verified2017-10-31ATH215814FB0C3138911100610113
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
AFB9270587B11DDF
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-10-31ATHC-PRP
M1596377/3066429863207284009 : 215814FB0C313891
PRP: Verified
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1596377/3066429863207284009 : 215814FB0C313891
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2010-03-27Wolfgang FluckF-ECM
Factor: 3066429863207284009