857 155 913 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
20628210111347385890503	23	74.1	2024-06-19 06:46:43

History

Date	User	Type	Result
2025-05-16	Greg	F	Factor: 20628210111347385890503 / TF: 74-75
2024-06-19	SRBase	F	Factor: 20628210111347385890503 / TF: 74-75*
2022-12-07	SRBase	NF	no factor TF: 73-74
2021-06-14	SRBase	NF	no factor TF: 72-73
2020-10-13	SRBase	NF	no factor TF: 71-72
2019-03-16	srow7	NF	no factor TF: 70-71
2017-01-13	ramgeis	NF	no factor TF: 68-70
2015-09-02	sasaki	NF	no factor TF: 67-68
2015-03-01	sasaki	NF	no factor TF: 66-67
2012-04-08	sannerud.com	NF	no factor TF: 65-66
2012-04-08	sannerud.com	NF	no factor TF: 64-65
2010-08-02	linded	NF	no factor TF: 63-64