257 131 999 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
51700002993137813235239	23	75.5	2025-02-02 13:20:24

History

Date	User	Type	Result
2025-02-02	NStorm	F	Factor: 51700002993137813235239 / TF: 75-76
2022-08-26	SRS Technology	NF	no factor TF: 74-75
2022-02-13	SRBase	NF	no factor TF: 73-74
2020-11-24	SRBase	NF	no factor TF: 72-73
2020-06-27	ANONYMOUS	NF	no factor TF: 71-72
2020-05-02	SRBase	NF	no factor TF: 70-71
2019-04-25	Chabot Prime	NF	no factor TF: 69-70
2018-05-03	Andrew B	NF	no factor TF: 68-69
2016-05-11	XZT	NF	no factor TF: 67-68
2015-12-16	mikeblas	NF	no factor TF: 66-67
2013-11-15	Michael Bahlen	NF	no factor TF: 65-66
2011-08-05	Lukin Dmitry	NF	no factor TF: 64-65
2010-03-09	Qubyc	NF	no factor TF: 63-64
2010-03-09	Qubyc	NF	no factor TF: 62-63