815 559 991 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: 1 known prime factor

Trial Factored to 2⁷⁶

TF target 2⁸⁴

Factored

Factor	Digits	Bits	Date
39772854989571581215231	23	75.1	2025-02-19 23:11:08

History

Date	User	Type	Result
2025-02-19	NStorm	F	Factor: 39772854989571581215231 / TF: 75-76
2024-04-06	SRBase	NF	no factor TF: 74-75
2022-11-25	SRBase	NF	no factor TF: 73-74
2021-06-03	SRBase	NF	no factor TF: 72-73
2020-10-10	SRBase	NF	no factor TF: 71-72
2019-10-21	Maciej Kmieciak	NF	no factor TF: 70-71
2017-01-03	ramgeis	NF	no factor TF: 68-70
2015-06-27	sasaki	NF	no factor TF: 67-68
2014-12-24	sasaki	NF	no factor TF: 66-67
2012-02-27	dsl	NF	no factor TF: 65-66
2012-02-27	dsl	NF	no factor TF: 64-65
2010-03-30	Architects Cubed	NF	no factor TF: 63-64