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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
209393Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
12982367823.6old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000192 / 1566
Estimated T-Level: 30.6
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver KruseC2F12C3AAAD5A3641013
Verified2017-10-12kkmrkkblmbrbkC2F12C3AAAD5A364112092913
Verified2020-04-17Oliver Kruse72F2B9BFEC6E474315528853
Verified2023-08-03USAFSS72F2B9BFEC6E474312653653
History
DateUserTypeResult
2023-08-03twmossCERT
PRP Certification
Proof certified good
2023-08-03USAFSSC-PRP
M209393/12982367 : 72F2B9BFEC6E4743
PRP proof power = 5
PRP: Verified
Proof certified good
2022-02-16Oliver KruseNF-PM1
B1=30000000, B2=10070832992220
2021-05-14Oliver KruseNF-PM1
B1=30000000, B2=3000000000
2020-04-17Oliver KruseC-PRP
M209393/12982367 : 72F2B9BFEC6E4743
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M209393/12982367 : C2F12C3AAAD5A364
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M209393/12982367 : C2F12C3AAAD5A364
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M209393/12982367 : C2F12C3AAAD5A364
PRP without proof (not generated)