66 600 449 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 =	600000
B2 =	12150000

Status	Date	User	Residue	Shift	Software
Verified	2015-05-12	Kyle Z Schmidt	51C2F0A07A611E0A	46245471	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-03-29	Ryan Propper	51C2F0A07A611E0A	8604878	Linux 64-bit,Prime95,v30.7,build 9

History

Date	User	Type	Result
2024-06-13	LaurV	NF	no factor TF: 71-72
2023-03-29	Ryan Propper	C-LL	51C2F0A07A611E0A
2015-05-12	Kyle Z Schmidt	C-LL	51C2F0A07A611E0A
2015-04-06	blip	NF	no factor TF: 74-75
2014-05-18	TheJudger	NF-PM1	B1=600000, B2=12150000, E=12
2014-03-15	blip	NF	no factor TF: 73-74
2014-02-21	RichD0	NF	no factor TF: 72-73
2014-02-12	Architects Cubed	NF	no factor TF: 71-72
2013-05-01	NoWhereMan	NF	no factor TF: 70-71
2012-05-16	Mr P-1	NF	no factor TF: 69-70
2010-05-08	]mh[ Virtek	NF	no factor TF: 68-69
2010-05-05	]mh[ Virtek	NF	no factor TF: 67-68
2010-03-02	unconnected	NF	no factor TF: 66-67
2010-03-01	unconnected	NF	no factor TF: 65-66
2009-12-15	Team_Inspector	NF	no factor TF: 64-65
2009-05-31	1997rj7	NF	no factor TF: 1-64