90 131 891 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 2⁷⁵

Factored

Factor	Digits	Bits	Date
28496659569941492034839	23	74.6	2018-11-24 20:06:55

History

Date	User	Type	Result
2025-06-03	Greg	F	Factor: 28496659569941492034839 / TF: 74-75
2024-05-16	James Heinrich	NF	no factor TF: 68-69
2018-11-24	Andrew B	F	Factor: 28496659569941492034839 / TF: 74-75*
2018-03-19	c10ck3r	NF-PM1	B1=10000
2017-12-17	Carsten Kossendey	NF	no factor TF: 73-74
2016-08-01	Carsten Kossendey	NF	no factor TF: 72-73
2015-01-28	Carsten Kossendey	NF	no factor TF: 71-72
2015-01-06	JakeW	NF	no factor TF: 70-71
2013-11-15	Carsten Kossendey	NF	no factor TF: 69-70
2011-05-04	Carsten Kossendey	NF	no factor TF: 68-69
2010-12-14	Carsten Kossendey	NF	no factor TF: 67-68
2010-09-14	Carsten Kossendey	NF	no factor TF: 66-67
2010-06-10	Carsten Kossendey	NF	no factor TF: 65-66