67 255 541 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 2⁷⁵

TF target 2⁷⁴

P-1

B1 =	660000
B2 =	14520000

Status	Date	User	Residue	Shift	Software
Verified	2015-07-29	Kyle Z Schmidt	6831DCC909644956	14500226	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-12-21	fapfapfap	6831DCC909644956	42283501	Linux 64-bit,Prime95,v30.8,build 18

History

Date	User	Type	Result
2023-12-21	fapfapfap	C-LL	6831DCC909644956
2015-07-29	Kyle Z Schmidt	C-LL	6831DCC909644956
2015-06-29	megavink	NF	no factor TF: 74-75
2014-05-15	The Mawn	NF	no factor TF: 73-74
2014-05-04	TheJudger	NF-PM1	B1=660000, B2=14520000, E=12
2014-04-24	The Mawn	NF	no factor TF: 72-73
2014-04-24	The Mawn	NF	no factor TF: 71-72
2012-07-13	Alex_Wu_Malaysia	NF	no factor TF: 70-71
2012-02-28	MarekB	NF	no factor TF: 69-70
2010-02-08	W. Oleinik	NF	no factor TF: 68-69
2010-01-25	Spielauer	NF	no factor TF: 67-68
2010-01-16	Spielauer	NF	no factor TF: 66-67
2010-01-06	Spielauer	NF	no factor TF: 65-66
2009-12-29	runesk	NF	no factor TF: 64-65
2008-12-13	Wojciech Florek	NF	no factor TF: 1-64