15 751 613 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
902328702399374590447	21	69.6	2015-11-27 15:04:01

Status	Date	User	Residue	Shift
Verified (Factored)	2002-11-24	Oddur Þór Þorkelsson	999402A43C8A666B	1016660
Verified (Factored)	2006-10-24	Eric Bravick	999402A43C8A666B	4625299

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2023-10-01	Poao	3F4C7DD8ECB3854C	1	1620580	5	3

P-1 factors

Date	Factor	B1	B2
2015-11-27	902328702399374590447	300000	6000000

History

Date	User	Type	Result
2023-10-01	Ben Delo	CERT	PRP Certification Proof certified good
2023-10-01	Poao	C-PRP	M15751613/902328702399374590447 : 3F4C7DD8ECB3854C PRP proof power = 8 PRP: Verified Proof certified good
2023-08-25	nordi	NF-PM1	B1=480000, B2=264402600
2023-07-28	nordi	NF-PM1	B1=480000
2022-04-11	LordJulius	NF	no factor from 2^67 to 2^68
2022-03-27	LordJulius	NF	no factor from 2^65 to 2^66
2015-11-27	Tha	F-PM1	Factor: 902328702399374590447 / (P-1, B1=300000, B2=6000000, E=12)
2014-07-10	Nesowa	NF	no factor from 2^66 to 2^67