Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
1905689Factored
FactorDigitsBitsDate
833833900231970024234903832686.12017-07-19 06:01:19
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Thomas Honold6B8D7AFFCA31288B0
Verified (Factored)Cornelius Caesar6B8D7AFFCA31288B0
Verified (Factored)2015-07-14MadPoo6B8D7AFFCA31288B1749555
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-28alpertron295B7C39BBAFFAFA1013
Verified2017-10-20Oliver Kruse295B7C39BBAFFAFA1110501613
History
DateUserTypeResult
2017-10-20Oliver KruseC-PRP
M1905689/83383390023197002423490383 : 295B7C39BBAFFAFA
PRP: Verified
PRP without proof (not generated)
2017-09-28alpertronC-PRP
M1905689/83383390023197002423490383 : 295B7C39BBAFFAFA
PRP: Verified
PRP without proof (not generated)
2017-07-19bamF-ECM
Factor: 83383390023197002423490383 / (ECM curve 3, B1=50000, B2=5000000)
2017-03-15Smok_bmv NF
no factor from 2^66 to 2^67
2015-08-31ramgeisNF
no factor from 2^65 to 2^66
2015-07-14MadPooC-LL
6B8D7AFFCA31288B
2015-05-19omylistNF
no factor from 2^64 to 2^65
2015-05-17omylistNF
no factor from 2^63 to 2^64
2011-06-01kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2011-02-08GrunwalderGIMPNF
no factor from 2^62 to 2^63
2011-02-08GrunwalderGIMPNF
no factor from 2^61 to 2^62
2009-05-25Architects CubedNF
no factor from 2^60 to 2^61