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
155602217No known factors, not tested for primality
TF
No factors below 278
TF target 278
P-1
B1 = 1224000
B2 = 890844240
History
DateUserTypeResult
2025-08-03kwe5ykdfNF-PM1
B1=1224000, B2=890844240
2025-05-31RichardNF
no factor from 2^77 to 2^78
2024-12-03James HeinrichNF
no factor from 2^76 to 2^77
2024-11-06James HeinrichNF
no factor from 2^76 to 2^77
2024-08-13SRBaseNF
no factor from 2^75 to 2^76
2023-02-18SRBaseNF
no factor from 2^74 to 2^75
2021-11-15SRBaseNF
no factor from 2^73 to 2^74
2017-11-25treborNF
no factor from 2^72 to 2^73
2017-10-17treborNF
no factor from 2^71 to 2^72
2017-09-12ZbiGNF
no factor from 2^70 to 2^71
2017-08-13La GüiraNF
no factor from 2^69 to 2^70
2016-08-02PascalBieriNF
no factor from 2^68 to 2^69
2016-05-03subgeniusNF
no factor from 2^67 to 2^68
2015-04-12guruNF
no factor from 2^66 to 2^67
2013-02-08RichardNF
no factor from 2^65 to 2^66
2011-01-23Mr-PlonkNF
no factor from 2^64 to 2^65