42 454 177 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 =	410000
B2 =	2152500

Status	Date	User	Residue	Shift	Software
Verified	2008-05-22	C. Cooper / S. Boone	75C26583462ECFFD	29808	Windows,Prime95,v24 final,NT service,(aka Wc5)
Verified	2017-11-05	Dubslow	75C26583462ECFFD	24876058	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2022-04-10	TheJudger	NF	no factor TF: 73-74
2022-04-10	TheJudger	NF	no factor TF: 72-73
2017-11-05	Dubslow	C-LL	75C26583462ECFFD
2015-08-27	-anonymous-	NF	no factor TF: 71-72
2015-03-18	1997rj7	NF	no factor TF: 70-71
2015-02-09	Andrew B	NF	no factor TF: 69-70
2014-03-06	LaurV	NF	no factor TF: 68-69
2008-05-21	curtisc	C-LL	75C26583462ECFFD
2008-03-29	curtisc	NF-PM1	B1=410000, B2=2152500
2007-06-15	Perendie	NF	no factor TF: 1-68