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
156503957No known factors, not tested for primality
TF
No factors below 278
TF target 278
P-1
B1 = 866000
B2 = 81098094
History
DateUserTypeResult
2025-09-15Ryan PropperNF-PM1
B1=866000, B2=81098094
2025-05-19brian-nebiusNF
no factor from 2^77 to 2^78
2024-10-15makabakaNF
no factor from 2^76 to 2^77
2024-10-11makabakaNF
no factor from 2^76 to 2^77
2024-08-19SRBaseNF
no factor from 2^75 to 2^76
2023-02-26SRBaseNF
no factor from 2^74 to 2^75
2021-11-16SRBaseNF
no factor from 2^73 to 2^74
2018-08-18David HruskaNF
no factor from 2^72 to 2^73
2018-05-25David HruskaNF
no factor from 2^71 to 2^72
2018-03-01proxy2222NF
no factor from 2^70 to 2^71
2017-11-08La GüiraNF
no factor from 2^69 to 2^70
2017-03-09subgeniusNF
no factor from 2^68 to 2^69
2016-05-07DerekNF
no factor from 2^67 to 2^68
2015-04-15vwflat4NF
no factor from 2^66 to 2^67
2013-02-07OS1NF
no factor from 2^65 to 2^66
2011-01-25dslNF
no factor from 2^64 to 2^65