55 441 817 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 =	550000
B2 =	11962500

Status	Date	User	Residue	Shift	Software
Verified	2014-01-23	Viacheslav Chernetskiy	4B47D76ACE02C933	11376059	Linux 64-bit,Prime95,v27.7,build 2
Verified	2021-03-21	Dubslow	4B47D76ACE02C933	1779420	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2021-03-21	Dubslow	C-LL	4B47D76ACE02C933
2019-05-26	TheJudger	NF	no factor TF: 73-74
2016-02-23	Mark Rose	NF	no factor TF: 58-63
2016-01-22	-anonymous-	NF	no factor TF: 72-73
2014-01-23	Viacheslav Chernetskiy	C-LL	4B47D76ACE02C933
2012-04-29	Jerry Hallett	NF-PM1	B1=550000, B2=11962500, E=12
2012-04-18	Greg	NF	no factor TF: 71-72
2012-04-18	Greg	NF	no factor TF: 70-71
2011-06-01	timweakley	NF	no factor TF: 69-70
2011-04-07	dsl	NF	no factor TF: 68-69
2009-05-15	BIGMATH	NF	no factor TF: 67-68
2009-01-05	scommisso	NF	no factor TF: 66-67
2009-01-05	scommisso	NF	no factor TF: 65-66
2009-01-04	scommisso	NF	no factor TF: 64-65
2008-12-22	1997rj7	NF	no factor TF: 63-64
2002-07-20	-anonymous-	NF	no factor TF: 1-58
2001-09-22	-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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