8 558 731 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
425283343391	12	38.6	old
1593087953417	13	40.5	2008-09-08 04:35:38

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-11-21	rucio	6C893253DE063FCF	2	4978495	5	3
Verified	2020-07-13	oodaira	6C893253DE063FCF	2	3782244	5	3

History

Date	User	Type	Result
2024-05-22	Stef42	NF-PM1	B1=1095000, B2=2188458090
2020-07-13	oodaira	C-PRP	M8558731/425283343391/1593087953417 : 6C893253DE063FCF PRP: Verified PRP without proof (not generated)
2018-11-21	rucio	C-PRP	M8558731/425283343391/1593087953417 : 6C893253DE063FCF PRP: Verified PRP without proof (not generated)
2008-09-08	Will Edgington	F	Factor: 1593087953417