53 912 893 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁶

TF target 2⁷³

P-1

B1 =	640000
B2 =	18080000

Status	Date	User	Residue	Shift	Software
Verified	2014-02-07	curtisc	BC866A5E2355A7A6	43591961	Windows Service,Prime95,v27.9,build 1
Verified	2020-10-26	Dubslow	BC866A5E2355A7A6	2995245	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2020-10-26	Dubslow	C-LL	BC866A5E2355A7A6
2020-06-28	-anonymous-	NF	no factor TF: 75-76
2020-06-25	-anonymous-	NF	no factor TF: 74-75
2019-07-06	Jon Pace	NF	no factor TF: 73-74
2016-02-13	AirSquirrels	NF	no factor TF: 72-73
2014-02-07	curtisc	C-LL	BC866A5E2355A7A6
2012-02-01	Numberwang	NF	no factor TF: 71-72
2011-09-08	megavink	NF	no factor TF: 70-71
2011-05-19	Fobdfobd	NF	no factor TF: 69-70
2011-04-16	blin00	NF	no factor TF: 68-69
2011-04-07	Michael-Abstract	NF-PM1	B1=640000, B2=18080000, E=6
2010-11-10	-anonymous-	NF	no factor TF: 67-68
2009-01-09	James Hintz	NF	no factor TF: 66-67
2009-01-08	MissingNo	NF	no factor TF: 65-66
2009-01-02	ANONYMOUS	NF	no factor TF: 64-65
2008-09-08	-anonymous-	NF	no factor TF: 1-64
2007-10-29	1997rj7	NF	no factor TF: 1-63
2004-06-12	1997rj7	NF	no factor TF: 1-60
2002-08-10	-anonymous-	NF	no factor TF: 1-58
2001-08-24	-anonymous-	NF	no factor TF: 1-57
2000-05-31	-anonymous-	NF	no factor TF: 1-56
2000-03-01	-anonymous-	NF	no factor TF: 1-54
2000-01-12	-anonymous-	NF	no factor TF: 1-53
1999-12-08	-anonymous-	NF	no factor TF: 1-53

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