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
6056221Factored
FactorDigitsBitsDate
648550056528640253592065.82011-07-31 02:10:34
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-02-07INTERSHOP Communications3F18750080F294690
Verified (Factored)2001-06-03ken bieber3F18750080F294691927128
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbkD3017D44A82515BF1013
Verified2018-09-16rucioD3017D44A82515BF1428410213
History
DateUserTypeResult
2023-05-11This -Anonymous-NF-PM1
B1=100000, B2=2000000, E=6
2018-09-16rucioC-PRP
M6056221/64855005652864025359 : D3017D44A82515BF
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M6056221/64855005652864025359 : D3017D44A82515BF
PRP: Verified
PRP without proof (not generated)
2011-07-31JimBaF-ECM
Factor: 64855005652864025359