12 336 131 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
10509066295019098679	20	63.2	old
4247887496247751898081702959421938441991	40	131.6	2022-02-28 07:15:26

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-03-08	XZT	2DCDD85FD37B18BB	2	7381246	5	3

P-1 factors

Date	Factor	B1	B2
2022-02-28	4247887496247751898081702959421938441991	400000	266270550

History

Date	User	Type	Result
2022-03-09	Simon Josefsson	CERT	PRP Certification Proof certified good
2022-03-08	XZT	C-PRP	M12336131/10509066295019098679/4247887496247751898081702959421938441991 : 2DCDD85FD37B18BB PRP proof power = 8 PRP: Verified Proof certified good
2022-02-28	nordi	F-PM1	Factor: 4247887496247751898081702959421938441991 / (P-1, B1=400000, B2=266270550)
2022-02-10	nordi	NF-PM1	B1=400000