18 294 671 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
10574319839	11	33.3	old
8447893638329	13	42.9	2008-09-08 14:28:59

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2025-09-16	MarkS	C3544988C3EC651E	2	11870574	5	3

History

Date	User	Type	Result
2025-09-16	One Man	CERT	PRP Certification Proof certified good
2025-09-16	MarkS	C-PRP	M18294671/10574319839/8447893638329 : C3544988C3EC651E PRP proof power = 8 PRP: Verified Proof certified good
2025-09-08	nordi	NF-PM1	B1=500000, B2=261614430
2008-09-08	Will Edgington	F	Factor: 8447893638329

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