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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Exponent Range:










MnStatusDetails
38284847Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 271
P-1
B1 = 618000
B2 = 12000000
LL
StatusDateUserResidueShift
Verified2007-05-28Mitchell Brackett1325040BBD9392CA12516275
Bad2015-03-31RMAC9.5A919D426B43F681919335946
Verified2015-04-22Evoflash1325040BBD9392CA12021546
History
DateUserTypeResult
2020-12-26-Anonymous-NF
no factor from 2^74 to 2^75
2020-02-21-Anonymous-NF
no factor from 2^73 to 2^74
2019-10-25-Anonymous-NF
no factor from 2^72 to 2^73
2019-10-25-Anonymous-NF
no factor from 2^71 to 2^72
2015-04-22EvoflashC-LL
1325040BBD9392CA
2015-03-31RMAC9.5C-LL
A919D426B43F6819
2014-12-02NickOfTimeNF
no factor from 2^70 to 2^71
2014-11-23Andrew BNF
no factor from 2^69 to 2^70
2014-11-20HBendtzNF-PM1
B1=618000, B2=12000000, E=12
2013-09-10Le ComteNF
no factor from 2^68 to 2^69