256 666 777 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 2⁸⁰

Factored

Factor	Digits	Bits	Date
61522226316418574620559	23	75.7	2025-02-01 18:06:49

History

Date	User	Type	Result
2025-02-01	NStorm	F	Factor: 61522226316418574620559 / TF: 75-76
2024-06-28	James Heinrich	NF	no factor TF: 72-74
2020-12-25	Yxinity	NF	no factor TF: 74-75
2020-11-18	Conductor	NF	no factor TF: 73-74
2020-11-18	Conductor	NF	no factor TF: 72-73
2020-07-01	SRBase	NF	no factor TF: 71-72
2020-05-02	SRBase	NF	no factor TF: 70-71
2019-04-23	Chabot Prime	NF	no factor TF: 69-70
2018-06-12	Niels_Mache_Nextcloud	NF	no factor TF: 68-69
2016-05-05	XZT	NF	no factor TF: 67-68
2015-12-25	Alex_soldier	NF	no factor TF: 66-67
2013-11-16	Richard	NF	no factor TF: 65-66
2011-08-04	tsc	NF	no factor TF: 64-65
2010-03-09	Iain Murray	NF	no factor TF: 63-64
2010-03-09	Iain Murray	NF	no factor TF: 62-63