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
161567221No known factors, not tested for primality
TF
No factors below 278
TF target 278
P-1
B1 = 1396000
B2 = 1503147360
History
DateUserTypeResult
2025-09-16GregNF
no factor from 2^76 to 2^78
2024-10-05Luke DurantNF-PM1
B1=1396000, B2=1503147360
2024-08-29SRBaseNF
no factor from 2^75 to 2^76
2023-03-04SRBaseNF
no factor from 2^74 to 2^75
2021-11-25SRBaseNF
no factor from 2^73 to 2^74
2018-06-16La GüiraNF
no factor from 2^72 to 2^73
2018-06-12Damian SilvestreNF
no factor from 2^71 to 2^72
2016-08-16AnrodionNF
no factor from 2^70 to 2^71
2016-08-13Adam BuranNF
no factor from 2^68 to 2^70
2016-03-23XZTNF
no factor from 2^67 to 2^68
2015-05-08PALKOTAMASNF
no factor from 2^66 to 2^67
2013-02-26sasaki3NF
no factor from 2^65 to 2^66
2011-02-03runeskNF
no factor from 2^64 to 2^65
2010-06-30Cedric VonckNF
no factor from 2^63 to 2^64