Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1781393Factored
FactorDigitsBitsDate
51240657450094391652.2old
92455986974463582713069195992892.92020-09-11 17:00:47
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 Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-03Oliver KruseDC97333DAF269B911013
Verified (Factored)2017-11-05kkmrkkblmbrbkDC97333DAF269B91192377913
Verified2020-09-14fre_games6968FF12E558C8152172728453
Verified2020-09-14kutens6968FF12E558C8152112807853
History
DateUserTypeResult
2020-09-14kutensC-PRP
M1781393/5124065745009439/9245598697446358271306919599 : 6968FF12E558C815
PRP: Verified
PRP without proof (not generated)
2020-09-14fre_gamesC-PRP
M1781393/5124065745009439/9245598697446358271306919599 : 6968FF12E558C815
PRP: Verified
PRP without proof (not generated)
2020-09-11_p95holder_F-ECM
Factor: 9245598697446358271306919599 / (ECM curve 7, B1=50000, B2=5000000)
2017-11-05kkmrkkblmbrbkC-PRP
M1781393/5124065745009439 : DC97333DAF269B91
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1781393/5124065745009439 : DC97333DAF269B91
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12