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
2178389Factored
FactorDigitsBitsDate
909233640991121450059572119692996.22016-10-24 03:36:33
ECM
DigitsB1Curves
2550000100 / 280
Estimated T-Level: 21.8 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Richard LarsonF8AF2EBD2C0360260
Verified (Factored)1999-03-15Mikko TuumanenF8AF2EBD2C0360261487579
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-10kkmrkkblmbrbk3FE763AD726CAF031013
Verified2017-10-24Oliver Kruse3FE763AD726CAF03181840813
History
DateUserTypeResult
2017-10-24Oliver KruseC-PRP
M2178389/90923364099112145005957211969 : 3FE763AD726CAF03
PRP: Verified
PRP without proof (not generated)
2017-10-10kkmrkkblmbrbkC-PRP
M2178389/90923364099112145005957211969 : 3FE763AD726CAF03
PRP: Verified
PRP without proof (not generated)
2016-11-17Gordon SpenceNF
no factor from 2^66 to 2^67
2016-10-24bamF-ECM
Factor: 90923364099112145005957211969 / (ECM curve 2, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-01-02ramgeisNF
no factor from 2^65 to 2^66
2015-12-22HBendtzNF-PM1
B1=700000, B2=21000000, e=12
2015-03-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-25VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-06JossNF-PM1
B1=148928
2014-06-21JossNF-PM1
B1=119464
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2011-01-14markrNF-PM1
B1=90000, B2=1620000, E=6
2010-11-08JossNF-PM1
B1=30000
2010-11-05JossNF-PM1
B1=15000
2009-01-07Sturle SundeNF
no factor from 2^61 to 2^62
2009-01-04Sturle SundeNF
no factor from 2^60 to 2^61