55 647 589 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 =	660000
B2 =	19140000

Status	Date	User	Residue	Shift	Software
Verified	2013-08-13	Kyle Z Schmidt	B256AD93250737EB	43766681	Windows 64-bit,Prime95,v27.9,build 1
Verified	2021-01-23	ddaugherty	B256AD93250737EB	14800724	Windows 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2021-01-23	ddaugherty	C-LL	B256AD93250737EB
2018-09-02	Chuck	NF	no factor TF: 73-74
2016-01-22	Judge Hale	NF	no factor TF: 72-73
2013-08-13	Kyle Z Schmidt	C-LL	B256AD93250737EB
2012-01-14	phoenicis	NF	no factor TF: 71-72
2011-08-28	TheJudger	NF	no factor TF: 70-71
2011-07-22	]mh[ Virtek	NF	no factor TF: 69-70
2011-07-05	evatutin	NF	no factor TF: 68-69
2011-06-30	Scott Crawford	NF-PM1	B1=660000, B2=19140000, E=6
2009-05-22	symallad	NF	no factor TF: 67-68
2009-01-10	Marzbug	NF	no factor TF: 66-67
2009-01-09	Marzbug	NF	no factor TF: 65-66
2009-01-08	Cakes	NF	no factor TF: 64-65
2008-08-25	-anonymous-	NF	no factor TF: 1-64
2002-08-03	-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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