138 860 443 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: 1 known prime factor

Factored

Factor	Digits	Bits	Date
61967241915941997502393	23	75.7	2024-07-17 16:26:32

History

Date	User	Type	Result
2025-06-23	Greg	F	Factor: 61967241915941997502393 / TF: 75-76
2024-07-17	SRBase	F	Factor: 61967241915941997502393 / TF: 75-76*
2023-01-15	SRBase	NF	no factor from 2^74 to 2^75
2021-08-02	SRBase	NF	no factor from 2^73 to 2^74
2020-10-25	SRBase	NF	no factor from 2^72 to 2^73
2016-05-24	Mihai Preda	NF	no factor from 2^71 to 2^72
2016-04-21	Choi4KANG	NF	no factor from 2^70 to 2^71
2016-03-06	La Güira	NF	no factor from 2^69 to 2^70
2016-03-06	La Güira	NF	no factor from 2^68 to 2^69
2016-03-06	La Güira	NF	no factor from 2^67 to 2^68
2015-01-29	el grocco	NF	no factor from 2^66 to 2^67
2012-11-26	Richard	NF	no factor from 2^65 to 2^66
2010-12-04	sannerud.com	NF	no factor from 2^64 to 2^65
2010-06-17	Richard	NF	no factor from 2^63 to 2^64