39 710 339 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: 1 known prime factor

Factored

Factor	Digits	Bits	Date
7840859646118042119791	22	72.7	2019-08-04 01:21:56

Status	Date	User	Residue	Shift
Bad	2008-09-16	C. Cooper / S. Boone	1B3E1BF3C4D4D0F5	36343335
Verified (Factored)	2009-01-05	G-Funk	D8876B7CC847EEC1	25352321
Bad	2015-10-26	demfloro	768268ED75C1F8B8	335086
Verified (Factored)	2015-11-16	MadPoo	D8876B7CC847EEC1	29698101

P-1 factors

Date	Factor	B1	B2
2019-08-04	7840859646118042119791	550000	11412500

History

Date	User	Type	Result
2019-08-04	Architects Cubed	F-PM1	Factor: 7840859646118042119791 / (P-1, B1=550000, B2=11412500, E=12)
2019-07-26	monst	NF	no factor from 2^71 to 2^72
2015-11-16	MadPoo	C-LL	D8876B7CC847EEC1
2015-10-26	demfloro	C-LL	768268ED75C1F8B8
2014-12-15	chalsall	NF	no factor from 2^70 to 2^71
2014-12-12	VictordeHollander	NF	no factor from 2^69 to 2^70
2009-01-05	G-Funk	C-LL	D8876B7CC847EEC1