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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
12821Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
174035886386086613584776945764578334110.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000003151 / 9201
Estimated T-Level: 41.7
TF below 2^134 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseDA8FA054BA0E432A1013
Verified2017-10-12kkmrkkblmbrbkDA8FA054BA0E432A1397013
Verified2020-04-17Oliver KruseE65AA21CD688C2691710253
Verified2024-07-01kkmrkkblmbrbkE65AA21CD688C2691415953
P-1 factors
DateFactorB1B2
2024-09-251740358863860866135847769457645783500000000000707246050405794944
History
DateUserTypeResult
2024-09-25Anton RepkoF-PM1
Factor: 1740358863860866135847769457645783 / (P-1, B1=500000000000, B2=707246050405794900)
2024-07-01kkmrkkblmbrbkC-PRP
M12821/1740358863860866135847769457645783 : E65AA21CD688C269
PRP: Verified
PRP without proof (small exponent)
2023-05-15JacobZNF-PM1
B1=8600000000, B2=36024966470342850
2020-04-17Oliver KruseC-PRP
M12821/1740358863860866135847769457645783 : E65AA21CD688C269
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M12821/1740358863860866135847769457645783 : DA8FA054BA0E432A
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12821/1740358863860866135847769457645783 : DA8FA054BA0E432A
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M12821/1740358863860866135847769457645783 : DA8FA054BA0E432A
PRP without proof (not generated)