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
51443213Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 273
P-1
B1 = 615000
B2 = 19680000
LL
StatusDateUserResidueShift
Verified2012-09-28Wayne Beardsley217AE68538A74D0421776972
Verified2019-01-22OscarX217AE68538A74D0421532001
History
DateUserTypeResult
2019-01-22OscarXC-LL
217AE68538A74D04
2016-02-23Mark RoseNF
no factor from 2^60 to 2^63
2016-01-01AirSquirrelsNF
no factor from 2^72 to 2^73
2012-09-28Wayne BeardsleyC-LL
217AE68538A74D04
2012-03-20Craig MeyersNF
no factor from 2^71 to 2^72
2011-11-13TheJudgerNF
no factor from 2^69 to 2^71
2009-12-13Sturle SundeNF
no factor from 2^68 to 2^69
2009-12-12Sturle SundeNF-PM1
B1=615000, B2=19680000, E=6
2009-04-23drmartin4NF
no factor from 2^67 to 2^68
2008-12-03CyberChris70NF
no factor from 2^66 to 2^67
2008-12-01CyberChris70NF
no factor from 2^65 to 2^66
2008-11-30S36049NF
no factor from 2^64 to 2^65
2008-11-29WorknPlayNF
no factor from 2^63 to 2^64