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
2122039Factored
FactorDigitsBitsDate
21220391824.3old
1458181359406010543112167.02018-01-07 10:42:19
ECM
DigitsB1Curves
255000099 / 280
Estimated T-Level: 21.8
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-08Oliver KruseB0619CD176B223311013
Verified (Factored)2017-11-17kkmrkkblmbrbkB0619CD176B223311140865413
Verified2018-01-09AdolfNor1AB32453E33BD0FF2204482353
Verified2018-01-10Oliver Kruse1AB32453E33BD0FF2107038253
History
DateUserTypeResult
2018-01-10Oliver KruseC-PRP
M2122039/21220391/145818135940601054311 : 1AB32453E33BD0FF
PRP: Verified
PRP without proof (not generated)
2018-01-09AdolfNorC-PRP
M2122039/21220391/145818135940601054311 : 1AB32453E33BD0FF
PRP: Verified
PRP without proof (not generated)
2018-01-07ATHF-ECM
Factor: 145818135940601054311 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-17kkmrkkblmbrbkC-PRP
M2122039/21220391 : B0619CD176B22331
PRP: Verified
PRP without proof (not generated)
2017-10-08Oliver KruseC-PRP
M2122039/21220391 : B0619CD176B22331
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12