66 854 311 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 =	575000
B2 =	8912500

Status	Date	User	Residue	Shift	Software
Verified	2015-06-03	Kyle Z Schmidt	1E1F86A2DC0E3A85	55676158	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-11-16	kdelisle2005	1E1F86A2DC0E3A85	14302740	Linux 64-bit,Prime95,v30.8,build 18

History

Date	User	Type	Result
2023-11-16	kdelisle2005	C-LL	1E1F86A2DC0E3A85
2015-06-03	Kyle Z Schmidt	C-LL	1E1F86A2DC0E3A85
2015-04-26	TheJudger	NF	no factor TF: 74-75
2013-08-06	jbafford	NF-PM1	B1=575000, B2=8912500
2013-07-17	kdgehman	NF	no factor TF: 73-74
2013-07-17	kdgehman	NF	no factor TF: 72-73
2013-07-14	kdgehman	NF	no factor TF: 71-72
2013-07-14	kdgehman	NF	no factor TF: 70-71
2012-02-11	Gnorfe	NF	no factor TF: 69-70
2010-10-19	Millsie	NF	no factor TF: 68-69
2010-10-16	Millsie	NF	no factor TF: 67-68
2010-08-10	lupul cel bun	NF	no factor TF: 66-67
2010-07-30	Sid & Andy	NF	no factor TF: 65-66
2010-07-26	GrunwalderGIMP	NF	no factor TF: 64-65
2009-05-03	1997rj7	NF	no factor TF: 1-64