44 180 251 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 =	530000
B2 =	13382500

Status	Date	User	Residue	Shift	Software
Bad	2010-08-19	David_Harvey	2B86F352ADA1A30F	30937535	Windows,Prime95,v25.11,build 2
Verified	2015-09-12	George Woltman	9E2CFB465C82B880	25422939	Windows 64-bit,Prime95,v28.6,build 1
Verified	2016-09-11	Mark Rose	9E2CFB465C82B880	21815486	Linux 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2018-04-23	ktony	NF	no factor TF: 73-74
2018-04-23	ktony	NF	no factor TF: 72-73
2016-09-11	Mark Rose	C-LL	9E2CFB465C82B880
2015-09-12	George Woltman	C-LL	9E2CFB465C82B880
2015-08-07	Sid & Andy	NF	no factor TF: 71-72
2015-07-24	Mark Rose	NF	no factor TF: 70-71
2015-05-09	LaurV	NF	no factor TF: 69-70
2014-02-05	LaurV	NF	no factor TF: 68-69
2010-08-19	David_Harvey	C-LL	2B86F352ADA1A30F
2009-10-07	Tomek Kordzikowski	NF-PM1	B1=530000, B2=13382500
2007-09-28	precius1	NF	no factor TF: 1-68
2004-08-06	dave_0273	NF	no factor TF: 1-62