Marin Mersenne 2^P-1
Username
Password
Forgot password?
Blue
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1902269Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
206814685691134.3old
459336222502739066056972375.32021-12-17 10:36:47
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)2025-09-02Kriesel235393986F629BC5013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-04Oliver Kruse0A4529892954D1BD1013
Verified (Factored)2017-11-09kkmrkkblmbrbk0A4529892954D1BD147725513
Verified2021-12-21SRJ2877235393986F629BC5282861853
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
235393986F629BC5
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2021-12-21hoonhoutCERT
PRP Certification
Proof certified good
2021-12-21SRJ2877C-PRP
M1902269/20681468569/45933622250273906605697 : 235393986F629BC5
PRP proof power = 7
PRP: Verified
Proof certified good
2021-12-17TJAOIF-ECM
Factor: 45933622250273906605697 / (ECM curve 19, B1=50000, B2=6600000)
2017-11-09kkmrkkblmbrbkC-PRP
M1902269/20681468569 : 0A4529892954D1BD
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1902269/20681468569 : 0A4529892954D1BD
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12