Cremona's table of elliptic curves

6440 = 2³ · 5 · 7 · 23

Class	r	Atkin-Lehner	Eigenvalues
6440a (1 curve)	1	2+ 5+ 7+ 23+	2+ -1 5+ 7+  2 -1  4  2
Curve Equation t Generators 6440a1 [0,-1,0,-3276,-71099] 1 [126:1225:1]
6440b (1 curve)	2	2+ 5+ 7+ 23-	2+ -1 5+ 7+ -2 -5 -6 -6
Curve Equation t Generators 6440b1 [0,-1,0,-936,11365] 1 [-2:115:1]&[6:77:1]
6440c (1 curve)	1	2+ 5+ 7- 23-	2+  1 5+ 7- -3  3  3  0
Curve Equation t Generators 6440c1 [0,1,0,-201,-1285] 1 [19:46:1]
6440d (1 curve)	1	2+ 5- 7+ 23-	2+ -1 5- 7+ -2  3 -6  6
Curve Equation t Generators 6440d1 [0,-1,0,160,-275] 1 [30:-175:1]
6440e (4 curves)	1	2- 5+ 7+ 23-	2-  0 5+ 7+  0  2 -2  4
Curve Equation t Generators 6440e1 [0,0,0,22,93] 2 [6:21:1] 6440e2 [0,0,0,-223,1122] 4 [-3:42:1] 6440e3 [0,0,0,-923,-9658] 2 [-13:12:1] 6440e4 [0,0,0,-3443,77758] 2 [43:96:1]
6440f (2 curves)	1	2- 5+ 7+ 23-	2- -2 5+ 7+ -6  4  2 -4
Curve Equation t Generators 6440f1 [0,1,0,-4296,-68096] 2 [72:32:1] 6440f2 [0,1,0,-29296,1871904] 2 [19:1150:1]
6440g (2 curves)	1	2- 5- 7+ 23+	2-  0 5- 7+  2 -4  6  0
Curve Equation t Generators 6440g1 [0,0,0,-47,114] 2 [-7:10:1] 6440g2 [0,0,0,53,534] 2 [-5:12:1]
6440h (2 curves)	1	2- 5- 7+ 23+	2- -2 5- 7+  0  2 -2 -4
Curve Equation t Generators 6440h1 [0,1,0,-40,0] 2 [-5:10:1] 6440h2 [0,1,0,160,160] 2 [3:26:1]
6440i (1 curve)	0	2- 5- 7+ 23-	2- -1 5- 7+  1  5 -7 -4
Curve Equation t 6440i1 [0,-1,0,-2071545,-1146907475] 1
6440j (2 curves)	0	2- 5- 7+ 23-	2-  2 5- 7+ -2 -4  2  8
Curve Equation t 6440j1 [0,-1,0,-120,-100] 2 6440j2 [0,-1,0,-1120,14700] 2
6440k (1 curve)	1	2- 5- 7- 23-	2- -1 5- 7- -2 -1 -2 -2
Curve Equation t Generators 6440k1 [0,-1,0,-180,1897] 1 [4:35:1]

Data from Elliptic Curve Data by J. E. Cremona.
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