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
1698569Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
23779967824.5old
59348000871032.52008-07-15 07:45:29
139526980164971443.72008-09-30 13:30:10
7816043358322727691859.42015-05-18 16:39:55
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)2025-09-02Kriesel781722BF2859D409013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-05Oliver Kruse5F4CB20AA25195E94013
Verified2017-11-11kkmrkkblmbrbk5F4CB20AA25195E94121202613
P-1 factors
DateFactorB1B2
2015-05-1878160433583227276950000015000000
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
781722BF2859D409
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-11-11kkmrkkblmbrbkC-PRP
M1698569/23779967/5934800087/13952698016497/781604335832272769 : 5F4CB20AA25195E9
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1698569/23779967/5934800087/13952698016497/781604335832272769 : 5F4CB20AA25195E9
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1698569/23779967/5934800087/13952698016497/781604335832272769 : 5F4CB20AA25195E9
PRP without proof (not generated)
2015-05-18alpertronF-PM1
Factor: 781604335832272769 / (P-1, B1=500000, B2=15000000, E=12)
2008-09-30markrF
Factor: 13952698016497
2008-07-15J FeitsmaF
Factor: 5934800087