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
445883Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
891767619.8old
21287239174091341.02008-07-21 09:19:28
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000195 / 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
Verified2017-09-24Oliver KruseED14FADCB483C8342013
Verified2017-09-24Oliver KruseED14FADCB483C8342013
Verified2017-11-09kkmrkkblmbrbkED14FADCB483C834231986513
Verified2020-04-18Oliver KruseEE2859766BD51B69241536053
Verified (Factored)2022-05-12Jorge CoveiroEE2859766BD51B6911330353
Verified (Factored)2022-05-12Jorge CoveiroEE2859766BD51B6911330353
Verified2024-07-25kkmrkkblmbrbkEE2859766BD51B69225014053
History
DateUserTypeResult
2024-07-25Manfred_Bruder_01-05-1988_DECERT
PRP Certification
Proof certified good
2024-07-25kkmrkkblmbrbkC-PRP
M445883/2128723917409/891767 : EE2859766BD51B69
PRP proof power = 6
PRP: Verified
Proof certified good
2022-05-12Jorge CoveiroC-PRP
M445883/891767 : EE2859766BD51B69
PRP proof power = 6
PRP: Verified (Factored)
PRP proof never uploaded
2020-04-18Oliver KruseC-PRP
M445883/891767/2128723917409 : EE2859766BD51B69
PRP: Verified
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M445883/891767/2128723917409 : ED14FADCB483C834
PRP: Verified
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M445883/891767/2128723917409 : ED14FADCB483C834
PRP: Verified
PRP without proof (not generated)
2017-09-24Oliver KruseC-PRP
M445883/891767/2128723917409 : ED14FADCB483C834
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=3000000, B2=100000000, E=12
2008-07-21J FeitsmaF
Factor: 2128723917409