857 222 897 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 2⁷⁵

TF target 2⁸⁵

Factored

Factor	Digits	Bits	Date
21281849651583773417119	23	74.2	2024-06-19 06:47:56

History

Date	User	Type	Result
2025-05-16	Greg	F	Factor: 21281849651583773417119 / TF: 74-75
2024-06-19	SRBase	F	Factor: 21281849651583773417119 / TF: 74-75*
2022-12-11	SRBase	NF	no factor TF: 73-74
2021-06-13	SRBase	NF	no factor TF: 72-73
2020-10-13	SRBase	NF	no factor TF: 71-72
2019-03-17	srow7	NF	no factor TF: 70-71
2017-01-01	ramgeis	NF	no factor TF: 68-70
2015-09-02	sasaki	NF	no factor TF: 67-68
2015-03-04	sasaki	NF	no factor TF: 66-67
2012-04-09	bcp19	NF	no factor TF: 65-66
2012-04-09	bcp19	NF	no factor TF: 64-65
2010-04-03	Architects Cubed	NF	no factor TF: 63-64