15 888 343 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
11811590609181658535155139071	29	93.3	2016-03-29 22:21:26

Status	Date	User	Residue	Shift
Verified (Factored)	2003-06-09	Stephen Wood	9099EFACA7924DDB	5844353
Verified (Factored)	2004-12-23	Chris Halsall	9099EFACA7924DDB	8244791

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2023-11-20	JacobZ	BF1E6F8EF8DC232D	1	7172125	5	3

P-1 factors

Date	Factor	B1	B2
2016-03-29	11811590609181658535155139071	300000	6000000

History

Date	User	Type	Result
2023-11-20	Radoslaw Gronikowski	CERT	PRP Certification Proof certified good
2023-11-20	JacobZ	C-PRP	M15888343/11811590609181658535155139071 : BF1E6F8EF8DC232D PRP proof power = 8 PRP: Verified Proof certified good
2023-09-24	nordi	NF-PM1	B1=480000, B2=264402600
2023-08-16	nordi	NF-PM1	B1=480000
2016-03-29	Tha	F-PM1	Factor: 11811590609181658535155139071 / (P-1, B1=300000, B2=6000000, E=12)
2014-07-20	Nesowa	NF	no factor from 2^66 to 2^67
2013-09-30	David Campeau	NF	no factor from 2^65 to 2^66