39 553 141 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷³

TF target 2⁷²

P-1

B1 =	635000
B2 =	635000

Status	Date	User	Residue	Shift	Software
Bad	2007-10-17	C. Cooper / S. Boone	D0B80EAF03460A10	30042889	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2009-04-04	Buckle	B361E010324E88B9	16183405	Windows,Prime95,v25.8,build 5
Verified	2016-06-04	AirSquirrels	B361E010324E88B9	26351650	CUDALucas v2.05.1

History

Date	User	Type	Result
2022-05-23	Bill Staffen	NF	no factor TF: 72-73
2019-12-14	Architects Cubed	NF	no factor TF: 71-72
2016-06-04	AirSquirrels	C-LL	B361E010324E88B9
2014-12-10	NickOfTime	NF	no factor TF: 70-71
2014-12-07	Mark Rose	NF	no factor TF: 69-70
2013-10-11	VictordeHollander	NF	no factor TF: 68-69
2009-04-04	Buckle	C-LL	B361E010324E88B9
2007-10-17	curtisc	C-LL	D0B80EAF03460A10
2007-08-14	curtisc	NF-PM1	B1=635000
2006-10-24	-anonymous-	NF	no factor TF: 1-68
2001-03-05	Joss	NF	no factor TF: 1-56