12 526 721 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
110638612792548267751	21	66.6	2015-03-22 10:15:04

Status	Date	User	Residue	Shift
Verified (Factored)	2001-04-29	Tahir Sh. Abaev	F1ED6BF72B7F18C7	8698744
Verified (Factored)	2004-08-06	Rich Hassler	F1ED6BF72B7F18C7	7870393

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-04-16	kutens	8AE30B1BBDAF4893	1	8317974	5	3

History

Date	User	Type	Result
2023-10-25	nordi	NF-PM1	B1=500000, B2=430944150
2023-10-19	nordi	NF-PM1	B1=500000
2022-04-16	lajo321	CERT	PRP Certification Proof certified good
2022-04-16	kutens	C-PRP	M12526721/110638612792548267751 : 8AE30B1BBDAF4893 PRP proof power = 8 PRP: Verified Proof certified good
2022-04-10	LordJulius	NF	no factor from 2^67 to 2^68
2015-03-22	Tha	F	Factor: 110638612792548267751 / TF: 66-67
2014-03-28	Nesowa	NF	no factor from 2^65 to 2^66
2013-06-20	lycorn	NF	no factor from 2^64 to 2^65