12 379 229 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
77617567725495414497	20	66.1	2015-03-13 09:54:12

Status	Date	User	Residue	Shift
Verified (Factored)	2001-11-03	Lee Smith	D26A9DC9B41FF641	9056995
Verified (Factored)	2004-09-16	Julian Straub	D26A9DC9B41FF641	8777780

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-03-22	kracker	92AFC4B11609ADBA	1	12129842	5	3
Verified	2022-03-23	ATH	92AFC4B11609ADBA	1	9517598	5	3

History

Date	User	Type	Result
2022-04-10	LordJulius	NF	no factor from 2^67 to 2^68
2022-03-23	lajo321	CERT	PRP Certification Proof certified good
2022-03-23	ATH	C-PRP	M12379229/77617567725495414497 : 92AFC4B11609ADBA PRP proof power = 8 PRP: Verified Proof certified good
2022-03-22	kracker	C-PRP	M12379229/77617567725495414497 : 92AFC4B11609ADBA PRP: Verified PRP without proof (not generated)
2022-03-05	nordi	NF-PM1	B1=400000, B2=266270550
2022-02-17	nordi	NF-PM1	B1=400000
2015-03-13	Tha	F	Factor: 77617567725495414497 / TF: 66-67
2013-09-18	Nesowa	NF	no factor from 2^65 to 2^66
2013-07-22	lycorn	NF	no factor from 2^64 to 2^65