8 331 203 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁸

TF target 2⁶⁸

Factored

Factor	Digits	Bits	Date
8470100816417	13	42.9	old
438564910464616193	18	58.6	2015-09-17 11:36:10

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2018-10-13	Oliver Kruse	5B871A87EA5FDCEB	2	2503354	5	3
Verified	PRP without proof (not generated)	2020-04-23	GAN	5B871A87EA5FDCEB	2	4553147	5	3

History

Date	User	Type	Result
2024-05-10	Stef42	NF-PM1	B1=1025000, B2=1519818300
2020-04-23	GAN	C-PRP	M8331203/8470100816417/438564910464616193 : 5B871A87EA5FDCEB
2018-10-13	Oliver Kruse	C-PRP	M8331203/8470100816417/438564910464616193 : 5B871A87EA5FDCEB
2015-09-17	TJAOI	F	Factor: 438564910464616193