55 042 121 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 =	535000
B2 =	9763750

Status	Date	User	Residue	Shift	Software
Verified	2013-01-09	curtisc	0C7DCBB487DF04A8	47078457	Windows Service,Prime95,v27.7,build 2
Verified	2021-02-21	Dubslow	0C7DCBB487DF04A8	3228473	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2021-02-21	Dubslow	C-LL	0C7DCBB487DF04A8
2019-04-15	ktony	NF	no factor TF: 73-74
2016-02-05	-anonymous-	NF	no factor TF: 72-73
2013-01-09	curtisc	C-LL	0C7DCBB487DF04A8
2012-06-20	Kyle Askine	NF-PM1	B1=535000, B2=9763750
2012-05-29	Tom Duell	NF	no factor TF: 71-72
2011-09-16	TheJudger	NF	no factor TF: 70-71
2011-09-09	David Campeau	NF	no factor TF: 69-70
2011-04-09	hansst	NF	no factor TF: 68-69
2009-05-11	PrimeCruncher	NF	no factor TF: 67-68
2009-03-09	korva	NF	no factor TF: 66-67
2009-03-06	korva	NF	no factor TF: 65-66
2009-03-01	Sturle Sunde	NF	no factor TF: 64-65
2008-07-07	-anonymous-	NF	no factor TF: 1-64
2002-06-23	-anonymous-	NF	no factor TF: 1-58
2001-09-01	-anonymous-	NF	no factor TF: 1-57
2000-05-24	-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
1999-12-01	-anonymous-	NF	no factor TF: 1-53

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