68 931 979 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 =	630000
B2 =	12442500

Status	Date	User	Residue	Shift	Software
Verified	2015-01-09	Arthur Rosenthal	13DA6A2C095C0A23	58398493	Windows 64-bit,Prime95,v27.7,build 2
Verified	2024-04-10	James Heinrich	13DA6A2C095C0A23	34020382	Linux 64-bit,Prime95,v30.19,build 4

History

Date	User	Type	Result
2024-04-10	James Heinrich	C-LL	13DA6A2C095C0A23
2020-01-14	Mark Rose	NF	no factor TF: 74-75
2015-01-09	Arthur Rosenthal	C-LL	13DA6A2C095C0A23
2014-01-03	PPed72	NF-PM1	B1=630000, B2=12442500, E=6
2013-12-17	Chuck	NF	no factor TF: 73-74
2013-12-17	Chuck	NF	no factor TF: 72-73
2012-09-28	SWL551	NF	no factor TF: 71-72
2012-09-28	SWL551	NF	no factor TF: 70-71
2012-08-01	TMarshall	NF	no factor TF: 69-70
2010-07-07	-anonymous-	NF	no factor TF: 68-69
2010-04-22	korva	NF	no factor TF: 67-68
2010-04-19	korva	NF	no factor TF: 66-67
2010-04-16	korva	NF	no factor TF: 65-66
2010-04-08	seekua	NF	no factor TF: 64-65
2009-01-26	1997rj7	NF	no factor TF: 1-64
2008-03-03	lycorn	NF	no factor TF: 1-63
2004-04-29	mdrg	NF	no factor TF: 1-61
2001-05-13	Joss	NF	no factor TF: 1-56