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
27672871Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 270
P-1
B1 = 325000
B2 = 6093750
LL
StatusDateUserResidueShift
Bad2005-02-18David Human98F3D850D6D566F415009881
Verified2012-09-10monstCA0220829A22C4349141569
Verified2012-11-02richsCA0220829A22C43418691099
History
DateUserTypeResult
2024-05-12James HeinrichNF
no factor from 2^68 to 2^69
2022-11-23Sid & AndyNF
no factor from 2^72 to 2^73
2020-10-11-Anonymous-NF
no factor from 2^71 to 2^72
2020-10-11-Anonymous-NF
no factor from 2^70 to 2^71
2017-04-08ramgeisNF
no factor from 2^69 to 2^70
2012-11-02richsC-LL
CA0220829A22C434
2012-09-10monstC-LL
CA0220829A22C434
2011-11-27Carsten KossendeyNF
no factor from 2^68 to 2^69
2011-09-22Carsten KossendeyNF
no factor from 2^67 to 2^68