40 054 709 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 2⁷⁴

TF target 2⁷²

P-1

B1 =	485000
B2 =	13337500

Status	Date	User	Residue	Shift	Software
Verified	2010-09-05	linded	BFBFE8B691975F6F	8694698	Windows,Prime95,v25.8,build 5
Verified	2017-02-06	Dubslow	BFBFE8B691975F6F	16988936	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-02-14	-anonymous-	NF	no factor TF: 73-74
2019-10-04	-anonymous-	NF	no factor TF: 72-73
2017-02-06	Dubslow	C-LL	BFBFE8B691975F6F
2015-01-01	Mark Rose	NF	no factor TF: 71-72
2014-12-16	Chuck	NF	no factor TF: 70-71
2014-12-16	Chuck	NF	no factor TF: 69-70
2013-11-03	VictordeHollander	NF	no factor TF: 68-69
2010-09-05	linded	C-LL	BFBFE8B691975F6F
2010-08-04	linded	NF-PM1	B1=485000, B2=13337500
2006-11-28	Team Prime Rib	NF	no factor TF: 1-68
2001-08-04	-anonymous-	NF	no factor TF: 1-57