68 812 213 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 =	735000
B2 =	8850000

Status	Date	User	Residue	Shift	Software
Verified	2015-02-27	Kyle Z Schmidt	AB40D729EF1F1AFA	66388283	Windows,Prime95,v28.5,build 2
Verified	2023-02-16	emmabyron	AB40D729EF1F1AFA	23727	Windows 64-bit,Prime95,v30.8,build 17

History

Date	User	Type	Result
2023-02-16	emmabyron	C-LL	AB40D729EF1F1AFA
2019-01-29	Sid & Andy	NF	no factor TF: 74-75
2015-02-27	Kyle Z Schmidt	C-LL	AB40D729EF1F1AFA
2014-10-29	Kyle Z Schmidt	NF-PM1	B1=735000, B2=8850000
2014-10-25	brilong	NF	no factor TF: 73-74
2014-10-25	brilong	NF	no factor TF: 72-73
2014-06-30	Jerry Hallett	NF	no factor TF: 71-72
2013-06-09	trif	NF	no factor TF: 70-71
2012-03-19	-anonymous-	NF	no factor TF: 69-70
2010-03-06	HighPriceRanch	NF	no factor TF: 68-69
2010-03-05	HighPriceRanch	NF	no factor TF: 67-68
2010-03-04	-anonymous-	NF	no factor TF: 66-67
2010-02-05	Charles Spalton	NF	no factor TF: 65-66
2010-01-27	abc	NF	no factor TF: 64-65
2008-12-01	1997rj7	NF	no factor TF: 1-64
2004-03-16	mdrg	NF	no factor TF: 1-61
2001-05-20	Joss	NF	no factor TF: 1-56