Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
19309Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
30701311824.9old
2881760547561083850731444712787.92011-04-03 15:37:29
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000003575 / 4588
Estimated T-Level: 38.9
TF below 2^124 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse1C2D7C00047210DC2013
Verified2017-10-12kkmrkkblmbrbk1C2D7C00047210DC252013
Verified2020-04-17Oliver KruseAADC9020BB1967052728553
Verified2024-07-01kkmrkkblmbrbkAADC9020BB1967052402453
History
DateUserTypeResult
2024-12-28masserNF-PP1
Start=149/31, B1=132000000, B2=131868000000
2024-12-24masserNF-PP1
Start=6/5, B1=132000000, B2=131868000000
2024-12-20masserNF-PP1
Start=2/7, B1=132000000, B2=131868000000
2024-07-01kkmrkkblmbrbkC-PRP
M19309/288176054756108385073144471/30701311 : AADC9020BB196705
PRP: Verified
PRP without proof (small exponent)
2023-05-16JacobZNF-PM1
B1=5400000000, B2=15129309322837710
2021-08-02ViliamFNF-PM1
B1=250000000, B2=42750000000
2020-04-17Oliver KruseC-PRP
M19309/30701311/288176054756108385073144471 : AADC9020BB196705
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M19309/30701311/288176054756108385073144471 : 1C2D7C00047210DC
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M19309/30701311/288176054756108385073144471 : 1C2D7C00047210DC
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M19309/30701311/288176054756108385073144471 : 1C2D7C00047210DC
PRP without proof (not generated)
2011-04-03James HintzF-ECM
Factor: 288176054756108385073144471