Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
28277Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
6784826313708826331859.2old
550496066554951674326632375.52010-04-24 07:26:24
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000001051 / 4588
Estimated T-Level: 36.1
TF below 2^115 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseD2A0E25372A784352013
Verified2017-10-02kkmrkkblmbrbkD2A0E25372A784352013
Verified2017-12-07ATHD2A0E25372A7843522369013
Verified2020-04-17Oliver Kruse21D47B16F066FCC12639053
Verified2024-07-01kkmrkkblmbrbk21D47B16F066FCC121958053
History
DateUserTypeResult
2024-11-26masserNF-PP1
Start=2/7, B1=100000000, B2=99900000000
2024-11-15masserNF-PP1
Start=6/5, B1=100000000, B2=99900000000
2024-11-09masserNF-PP1
Start=76/59, B1=100000000, B2=99900000000
2024-07-01kkmrkkblmbrbkC-PRP
M28277/55049606655495167432663/678482631370882633 : 21D47B16F066FCC1
PRP: Verified
PRP without proof (small exponent)
2023-02-17nordiNF-PM1
B1=3000000000, B2=925584566816910
2022-10-15nordiNF-PM1
B1=3000000000
2020-04-17Oliver KruseC-PRP
M28277/678482631370882633/55049606655495167432663 : 21D47B16F066FCC1
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M28277/678482631370882633/55049606655495167432663 : D2A0E25372A78435
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M28277/678482631370882633/55049606655495167432663 : D2A0E25372A78435
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M28277/678482631370882633/55049606655495167432663 : D2A0E25372A78435
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M28277/678482631370882633/55049606655495167432663 : D2A0E25372A78435
PRP without proof (not generated)
2016-12-28kkmrkkblmbrbkNF-PM1
B1=500000000, B2=10000000000, E=12
2010-04-24James HintzF-ECM
Factor: 55049606655495167432663