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
8447Factored
FactorDigitsBitsDate
3343389669191238.3old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000008203 / 16550
Estimated T-Level: 47.5
TF below 2^153 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseA2BB7DFE04CF63EA1013
Verified2017-10-12kkmrkkblmbrbkA2BB7DFE04CF63EA1350913
Unverified2020-04-17Oliver KruseE64D3490065E88__1237053
History
DateUserTypeResult
2023-08-23JacobZNF-PM1
B1=69000000000, B2=265422648792401100
2021-12-16Lisander ViaeneNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M8447/334338966919 : E64D3490065E88__
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M8447/334338966919 : A2BB7DFE04CF63EA
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M8447/334338966919 : A2BB7DFE04CF63EA
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M8447/334338966919 : A2BB7DFE04CF63EA
PRP without proof (not generated)