55 713 991 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	2013-08-13	Kyle Z Schmidt	A2CFCF5008D25692	47031581	Windows 64-bit,Prime95,v27.9,build 1
Verified	2021-02-02	ANONYMOUS	A2CFCF5008D25692	15501881	Windows 64-bit,Prime95,v29.8,build 6
Verified	2022-06-08	-anonymous-	A2CFCF5008D25692	15018694	Windows 64-bit,Prime95,v29.8,build 3

History

Date	User	Type	Result
2022-06-08	-anonymous-	C-LL	A2CFCF5008D25692
2021-02-02	ANONYMOUS	C-LL	A2CFCF5008D25692
2019-03-10	Chuck	NF	no factor TF: 73-74
2016-02-19	-anonymous-	NF	no factor TF: 72-73
2013-08-13	Kyle Z Schmidt	C-LL	A2CFCF5008D25692
2012-07-15	TheJudger	NF-PM1	B1=555000, B2=12071250, E=12
2012-04-28	megavink	NF	no factor TF: 71-72
2012-04-28	megavink	NF	no factor TF: 70-71
2011-06-05	drewha - Belarus	NF	no factor TF: 69-70
2011-04-11	Net_Force	NF	no factor TF: 68-69
2010-01-14	Frankie	NF	no factor TF: 67-68
2009-11-15	Frankie	NF	no factor TF: 66-67
2009-01-06	Sturle Sunde	NF	no factor TF: 65-66
2009-01-05	Sturle Sunde	NF	no factor TF: 64-65
2008-09-22	-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
2000-06-11	-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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