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
73039Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
2921561721.5old
1860446024253783162972167.32008-08-26 20:09:22
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000535 / 4588
Estimated T-Level: 35.6
TF below 2^113 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseF4DDF9FE5E54953F2013
Verified2017-10-13kkmrkkblmbrbkF4DDF9FE5E54953F2358513
Verified2020-04-17Oliver Kruse19AB39B0E552CC0923958853
Verified2024-02-03Wentao Huang19AB39B0E552CC0921216753
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M73039/2921561/186044602425378316297 : 19AB39B0E552CC09
PRP: Verified
PRP without proof (small exponent)
2024-02-02masserNF-PP1
Start=137/19, B1=25000000, B2=1775000000
2024-01-31masserNF-PP1
Start=6/5, B1=25000000, B2=1775000000
2024-01-30masserNF-PP1
Start=2/7, B1=25000000, B2=1775000000
2022-04-09George WoltmanNF-PM1
B1=1000000000, B2=91779340773120
2020-04-17Oliver KruseC-PRP
M73039/2921561/186044602425378316297 : 19AB39B0E552CC09
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M73039/2921561/186044602425378316297 : F4DDF9FE5E54953F
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M73039/2921561/186044602425378316297 : F4DDF9FE5E54953F
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M73039/2921561/186044602425378316297 : F4DDF9FE5E54953F
PRP without proof (not generated)
2016-11-30kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2008-08-26-Anonymous-F-ECM
Factor: 186044602425378316297