8 105 281 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
16340246497	11	33.9	old

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-08-18	ANONYMOUS	28E95CFE079278B9	1	7467608	5	3
Verified	2020-02-06	daveward2005	28E95CFE079278B9	1	1698666	5	3

History

Date	User	Type	Result
2022-11-26	Flaukrotist	NF	no factor from 2^68 to 2^69
2022-06-16	Flaukrotist	NF-PM1	B1=2200000, B2=1908376140
2022-01-29	Flaukrotist	NF	no factor from 2^67 to 2^68
2020-02-06	daveward2005	C-PRP	M8105281/16340246497 : 28E95CFE079278B9 PRP: Verified PRP without proof (not generated)
2018-08-18	ANONYMOUS	C-PRP	M8105281/16340246497 : 28E95CFE079278B9 PRP: Verified PRP without proof (not generated)