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
158772221No known factors, not tested for primality
TF
No factors below 278
TF target 278
P-1
B1 = 966000
B2 = 93504642
History
DateUserTypeResult
2025-07-31GregNF
no factor from 2^77 to 2^78
2025-06-30GregNF
no factor from 2^76 to 2^77
2024-10-03Ryan PropperNF-PM1
B1=966000, B2=93504642
2024-08-22SRBaseNF
no factor from 2^75 to 2^76
2023-02-26SRBaseNF
no factor from 2^74 to 2^75
2021-11-21SRBaseNF
no factor from 2^73 to 2^74
2018-01-23ANONYMOUSNF
no factor from 2^72 to 2^73
2018-01-22shbrisNF
no factor from 2^71 to 2^72
2017-12-20proxy2222NF
no factor from 2^70 to 2^71
2017-12-12La GüiraNF
no factor from 2^69 to 2^70
2017-02-10Adam BuranNF
no factor from 2^68 to 2^69
2016-05-15stargraveNF
no factor from 2^67 to 2^68
2015-04-26guruNF
no factor from 2^66 to 2^67
2013-02-16sasaki3NF
no factor from 2^65 to 2^66
2011-02-02RichardNF
no factor from 2^64 to 2^65
2010-06-28carlos56NF
no factor from 2^63 to 2^64