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
122027Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2196487721.1old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000364 / 1566
Estimated T-Level: 31.2
TF below 2^99 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver KruseCE36B1D8EBF913631013
Verified2017-10-13kkmrkkblmbrbkCE36B1D8EBF91363111273813
Verified2020-04-17Oliver Kruse0C72327E4EC41CA411091053
Verified2024-02-03Wentao Huang0C72327E4EC41CA419954353
History
DateUserTypeResult
2024-02-03Jon PaceCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M122027/2196487 : 0C72327E4EC41CA4
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M122027/2196487 : 0C72327E4EC41CA4
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M122027/2196487 : CE36B1D8EBF91363
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M122027/2196487 : CE36B1D8EBF91363
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M122027/2196487 : CE36B1D8EBF91363
PRP without proof (not generated)
2017-02-28kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12