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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MnStatusDetails
2189227Factored
FactorDigitsBitsDate
2644808857072346691517189932787.82013-05-18 16:35:32
ECM
DigitsB1Curves
255000093 / 280
Estimated T-Level: 21.7
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ars Technica Team Prime RibA562DF1692FC19670
Verified (Factored)1999-05-30Robert BrownellA562DF1692FC19671401564
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-09Oliver KruseB1850E226865779D1013
Verified2017-11-23kkmrkkblmbrbkB1850E226865779D1122210613
History
DateUserTypeResult
2017-11-23kkmrkkblmbrbkC-PRP
M2189227/264480885707234669151718993 : B1850E226865779D
PRP: Verified
PRP without proof (not generated)
2017-10-09Oliver KruseC-PRP
M2189227/264480885707234669151718993 : B1850E226865779D
PRP: Verified
PRP without proof (not generated)
2016-03-30alpertronNF-PM1
B1=500000, B2=15000000, E=12
2013-05-18XyzzyF-ECM
Factor: 264480885707234669151718993
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2011-01-12markrNF-PM1
B1=90000, B2=1620000, E=6
2010-11-08JossNF-PM1
B1=30000
2010-11-04JossNF-PM1
B1=15000
2009-01-07Sturle SundeNF
no factor from 2^61 to 2^62
2009-01-02Sturle SundeNF
no factor from 2^60 to 2^61