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
21289739Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 269
P-1
B1 = 757000
B2 = 40183000
LL
StatusDateUserResidueShift
Bad2004-12-13S1683636775FF19A16E957D20452305
Verified2005-04-26Stig Wandén661A52B4F47489161814048
Verified2008-10-15R. Elgersma661A52B4F47489165591682
History
DateUserTypeResult
2021-12-29RichD0NF-PM1
B1=757000, B2=40183000
2021-10-31TheJudgerNF
no factor from 2^73 to 2^74
2021-10-31TheJudgerNF
no factor from 2^72 to 2^73
2021-10-01-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-14SRBaseNF
no factor from 2^70 to 2^71
2018-04-22ramgeisNF
no factor from 2^69 to 2^70
2017-12-22VictordeHollanderNF
no factor from 2^68 to 2^69
2017-05-28ramgeisNF
no factor from 2^67 to 2^68
2015-04-22NRNF
no factor from 2^66 to 2^67