53 917 841 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 =	570000
B2 =	12967500

Status	Date	User	Residue	Shift	Software
Verified	2011-11-28	Dubslow	53C2FEF05B084955	26727195	Windows 64-bit,Prime95,v26.6,build 3
Verified	2018-06-04	-anonymous-	53C2FEF05B084955	53157176	Windows 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2020-06-27	-anonymous-	NF	no factor TF: 75-76
2020-06-25	-anonymous-	NF	no factor TF: 74-75
2019-07-13	Jon Pace	NF	no factor TF: 73-74
2018-06-04	-anonymous-	C-LL	53C2FEF05B084955
2016-02-13	AirSquirrels	NF	no factor TF: 72-73
2015-12-18	-anonymous-	NF	no factor TF: 71-72
2011-11-28	Dubslow	C-LL	53C2FEF05B084955
2011-11-04	Dubslow	NF-PM1	B1=570000, B2=12967500, E=12
2011-10-17	Dubslow	NF	no factor TF: 69-71
2011-10-05	rduerr	NF	no factor TF: 68-69
2009-05-08	richardb888	NF	no factor TF: 67-68
2009-02-24	jfarek	NF	no factor TF: 66-67
2009-02-22	jfarek	NF	no factor TF: 65-66
2008-12-22	Sturle Sunde	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

Username
Password