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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Exponent Range:










MnStatusDetails
1945199Factored
FactorDigitsBitsDate
25093067111031.2old
3571447835374459271292168.32021-12-16 19:00:01
ECM
DigitsB1Curves
2550000280 / 280
3025000056 / 640
Estimated T-Level: 25.4 ⓘ
TF below 2^80 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-05Oliver Kruse91C199FB6E4B0C8C1013
Verified (Factored)2017-11-11kkmrkkblmbrbk91C199FB6E4B0C8C1121755013
Verified2021-12-18_p95holder_59E75201619D56E02116110753
Verified2021-12-21ATH59E75201619D56E0247985253
History
DateUserTypeResult
2021-12-21Simon JosefssonCERT
PRP Certification
Proof certified good
2021-12-21ATHC-PRP
M1945199/2509306711/357144783537445927129 : 59E75201619D56E0
PRP proof power = 7
PRP: Verified
Proof certified good
2021-12-18_p95holder_C-PRP
M1945199/2509306711/357144783537445927129 : 59E75201619D56E0
PRP: Verified
PRP without proof (not generated)
2021-12-16_p95holder_F-ECM
Factor: 357144783537445927129 / (ECM curve 1, B1=50000, B2=5000000)
2017-11-11kkmrkkblmbrbkC-PRP
M1945199/2509306711 : 91C199FB6E4B0C8C
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1945199/2509306711 : 91C199FB6E4B0C8C
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12