42 014 611 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 =	12246250

Status	Date	User	Residue	Shift	Software
Verified	2009-05-19	SRS Technology	5D0C1AF6579E30AC	21427990	Windows,Prime95,v25.7,build 3
Verified	2017-09-17	Dubslow	5D0C1AF6579E30AC	19044354	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2018-09-24	LaurV	NF	no factor TF: 73-74
2018-09-24	LaurV	NF	no factor TF: 72-73
2017-09-17	Dubslow	C-LL	5D0C1AF6579E30AC
2015-09-11	AirSquirrels	NF	no factor TF: 71-72
2015-02-24	David Campeau	NF	no factor TF: 70-71
2015-01-14	chalsall	NF	no factor TF: 69-70
2009-05-19	SRS Technology	C-LL	5D0C1AF6579E30AC
2009-04-20	SRS Technology	NF-PM1	B1=485000, B2=12246250
2007-07-04	Team Prime Rib	NF	no factor TF: 1-69
2002-06-02	Net_Force	NF	no factor TF: 1-60