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
1864979Factored
FactorDigitsBitsDate
3729959721.8old
282134023131134.72008-07-15 07:47:34
20566030713423839945532270.82020-12-10 12:54:48
3911262076682392924021512478.42020-07-03 11:34:01
741951069212776430410990312685.92021-09-03 08:16:37
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)2017-10-04Oliver Kruse345585FC0D67AD472013
Verified (Factored)2017-11-07ATH345585FC0D67AD47227400813
Verified (Factored)2020-07-03M Miller180378A3E6DEA0AF332719053
Verified (Factored)2020-07-04marssystems180378A3E6DEA0AF360109453
Verified (Factored)2020-12-11Massimo Cappelli (ik5pwa)180378A3E6DEA0AF4130187053
Verified2021-09-04SRJ2877180378A3E6DEA0AF5152554553
History
DateUserTypeResult
2021-09-04curtiscCERT
PRP Certification
Proof certified good
2021-09-04SRJ2877C-PRP
M1864979/3729959/28213402313/2056603071342383994553/391126207668239292402151/74195106921277643041099031 : 180378A3E6DEA0AF
PRP proof power = 7
PRP: Verified
Proof certified good
2021-09-03TJAOIF-ECM
Factor: 74195106921277643041099031 / (ECM curve 108, B1=50000, B2=6600000)
2020-12-11Massimo Cappelli (ik5pwa)C-PRP
M1864979/3729959/28213402313/391126207668239292402151/2056603071342383994553 : 180378A3E6DEA0AF
PRP: Verified (Factored)
PRP without proof (not generated)
2020-12-10MarkSF-ECM
Factor: 2056603071342383994553 / (ECM curve 31, B1=50000, B2=5000000, Sigma=867290260283989)
2020-07-04marssystemsC-PRP
M1864979/3729959/28213402313/391126207668239292402151 : 180378A3E6DEA0AF
PRP: Verified (Factored)
PRP without proof (not generated)
2020-07-03M MillerC-PRP
M1864979/3729959/28213402313/391126207668239292402151 : 180378A3E6DEA0AF
PRP: Verified (Factored)
PRP without proof (not generated)
2020-07-03nordiF-ECM
Factor: 391126207668239292402151 / (ECM curve 3, B1=50000, B2=5000000, Sigma=2867964797321367)
2017-11-07ATHC-PRP
M1864979/3729959/28213402313 : 345585FC0D67AD47
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1864979/3729959/28213402313 : 345585FC0D67AD47
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 28213402313