42 249 167 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite: 1 known prime factor

Trial Factored to 2⁷³

TF target 2⁷²

Factored

Factor	Digits	Bits	Date
2613694640869040623805767	25	81.1	2017-02-07 21:04:53

P-1 factors

Date	Factors	B1	B2
2017-02-07	2613694640869040623805767	760000	20500000

Status	Date	User	Residue	Shift	Software
Factored	2008-10-15	Bob Moore	D2F66FA9A8EF061B	39291027	Windows,Prime95,v24 final,(aka Wc1)
Factored	2017-02-05	Mark Rose	7DE65A65F5327DEA	1332056	Linux 64-bit,Prime95,v28.9,build 2
Factored	2017-02-07	ktony	DEB48ACD3F7814FC	26456282	Windows 64-bit,Prime95,v28.10,build 1

History

Date	User	Type	Result
2024-06-25	Greg	NF	no factor TF: 70-71
2017-02-07	riccardo uberti	F-PM1	Factor: 2613694640869040623805767 / B1=760000, B2=20500000
2017-02-07	ktony	C-LL	DEB48ACD3F7814FC
2017-02-06	Bruno Victal	NF	no factor TF: 72-73
2017-02-05	Mark Rose	C-LL	7DE65A65F5327DEA
2015-09-27	AirSquirrels	NF	no factor TF: 71-72
2015-03-29	kracker	NF	no factor TF: 70-71
2015-01-22	1997rj7	NF	no factor TF: 69-70
2014-03-05	LaurV	NF	no factor TF: 68-69
2008-10-14	-anonymous-	C-LL	D2F66FA9A8EF061B
2008-08-07	-anonymous-	NF-PM1	B1=710000
2007-05-28	Michael Hanscho	NF	no factor TF: 1-68