55 678 153 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁴

TF target 2⁷³

P-1

B1 =	555000
B2 =	12071250

Status	Date	User	Residue	Shift	Software
Verified	2012-08-05	Stephan Grupp	B55CFA29D99B1F2D	51454435	Windows,Prime95,v25.11,build 2
Verified	2021-04-12	Dubslow	B55CFA29D99B1F2D	16224020	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2021-04-12	Dubslow	C-LL	B55CFA29D99B1F2D
2018-08-26	Mark Rose	NF	no factor TF: 73-74
2016-02-20	-anonymous-	NF	no factor TF: 72-73
2012-08-05	Stephan Grupp	C-LL	B55CFA29D99B1F2D
2012-06-17	TheJudger	NF-PM1	B1=555000, B2=12071250, E=12
2012-06-08	Kyle Askine	NF	no factor TF: 71-72
2012-02-01	Kevin Jaget	NF	no factor TF: 70-71
2011-06-06	steinrar	NF	no factor TF: 69-70
2011-04-08	GrunwalderGIMP	NF	no factor TF: 68-69
2009-11-24	1fast6	NF	no factor TF: 67-68
2009-11-21	1fast6	NF	no factor TF: 66-67
2009-11-18	SAHS Physics Club	NF	no factor TF: 65-66
2009-11-15	Sturle Sunde	NF	no factor TF: 64-65
2008-09-08	-anonymous-	NF	no factor TF: 1-64
2002-08-10	-anonymous-	NF	no factor TF: 1-58
2001-09-30	-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
2000-01-19	-anonymous-	NF	no factor TF: 1-53
1999-12-15	-anonymous-	NF	no factor TF: 1-53

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