Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
1751699Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
3503399721.7old
33436605681911341.62008-07-15 07:46:07
12288415636479678990266232580.02020-08-07 11:07:04
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)2025-09-02Kriesel7E7FE94114F437D4013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-03Oliver Kruse0EE9942CCD0A6D6F2013
Verified (Factored)2017-11-03kkmrkkblmbrbk0EE9942CCD0A6D6F2169061513
Verified2020-08-08mrh7E7FE94114F437D43115240553
Verified2020-08-08kutens7E7FE94114F437D4333646853
History
DateUserTypeResult
2025-09-03Joan GayonCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
7E7FE94114F437D4
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2020-08-08kutensC-PRP
M1751699/3503399/3343660568191/1228841563647967899026623 : 7E7FE94114F437D4
PRP: Verified
PRP without proof (not generated)
2020-08-08mrhC-PRP
M1751699/3503399/3343660568191/1228841563647967899026623 : 7E7FE94114F437D4
PRP: Verified
PRP without proof (not generated)
2020-08-07TJAOIF-ECM
Factor: 1228841563647967899026623 / (ECM curve 78, B1=50000, B2=5000000)
2017-11-03kkmrkkblmbrbkC-PRP
M1751699/3503399/3343660568191 : 0EE9942CCD0A6D6F
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1751699/3503399/3343660568191 : 0EE9942CCD0A6D6F
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 3343660568191