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
47201387Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 272
P-1
B1 = 500000
B2 = 4375000
LL
StatusDateUserResidueShift
Bad2009-02-21Stephan Grupp4DDB301CA1E0C39620004715
Verified2010-10-26lap39FE0AF370B1FD4A2653292
Verified2016-07-06MadPoo39FE0AF370B1FD4A36838591
History
DateUserTypeResult
2018-01-12Andrew BNF
no factor from 2^72 to 2^73
2016-07-06MadPooC-LL
39FE0AF370B1FD4A
2015-08-09Sid & AndyNF
no factor from 2^71 to 2^72
2015-08-04GregNF
no factor from 2^70 to 2^71
2015-07-13Sid & AndyNF
no factor from 2^69 to 2^70
2013-10-13Le ComteNF
no factor from 2^68 to 2^69
2010-10-26lapC-LL
39FE0AF370B1FD4A
2009-02-21Stephan GruppC-LL
4DDB301CA1E0C396
2008-12-18Stephan GruppNF-PM1
B1=500000, B2=4375000