Cremona's table of elliptic curves

20640 = 2⁵ · 3 · 5 · 43

Class	r	Atkin-Lehner	Eigenvalues
20640a (4 curves)	0	2+ 3+ 5+ 43-	2+ 3+ 5+  0  4 -2  2 -4
Curve Equation t 20640a1 [0,-1,0,-466,-920] 4 20640a2 [0,-1,0,-5841,-169695] 2 20640a3 [0,-1,0,-4336,110536] 2 20640a4 [0,-1,0,1784,-9020] 4
20640b (1 curve)	0	2+ 3+ 5+ 43-	2+ 3+ 5+  3 -4 -1  4 -5
Curve Equation t 20640b1 [0,-1,0,-69256,-7034444] 1
20640c (4 curves)	0	2+ 3+ 5+ 43-	2+ 3+ 5+  4  0  2  2 -4
Curve Equation t 20640c1 [0,-1,0,-646,6496] 4 20640c2 [0,-1,0,-1096,-3224] 2 20640c3 [0,-1,0,-10321,407041] 2 20640c4 [0,-1,0,-216,14580] 2
20640d (2 curves)	0	2+ 3+ 5- 43+	2+ 3+ 5- -2  0  2  2  8
Curve Equation t 20640d1 [0,-1,0,-370,-2600] 2 20640d2 [0,-1,0,-120,-6300] 2
20640e (1 curve)	1	2+ 3+ 5- 43-	2+ 3+ 5-  1  0 -3  0  3
Curve Equation t Generators 20640e1 [0,-1,0,40,-120] 1 [17:72:1]
20640f (1 curve)	0	2+ 3- 5+ 43+	2+ 3- 5+ -3  4 -1  4  5
Curve Equation t 20640f1 [0,1,0,-69256,7034444] 1
20640g (2 curves)	0	2+ 3- 5+ 43+	2+ 3- 5+  4 -6 -2 -8  6
Curve Equation t 20640g1 [0,1,0,-1546,-23920] 2 20640g2 [0,1,0,-1521,-24705] 2
20640h (4 curves)	0	2+ 3- 5+ 43+	2+ 3- 5+ -4  0  2  2  4
Curve Equation t 20640h1 [0,1,0,-646,-6496] 4 20640h2 [0,1,0,-10321,-407041] 2 20640h3 [0,1,0,-1096,3224] 2 20640h4 [0,1,0,-216,-14580] 2
20640i (2 curves)	1	2+ 3- 5+ 43-	2+ 3- 5+ -4  0 -4  4  4
Curve Equation t Generators 20640i1 [0,1,0,54,0] 2 [6:24:1] 20640i2 [0,1,0,-216,-216] 2 [-6:30:1]
20640j (4 curves)	1	2+ 3- 5- 43+	2+ 3- 5-  0  4 -6  2  0
Curve Equation t Generators 20640j1 [0,1,0,-2330,42000] 4 [-2:216:1] 20640j2 [0,1,0,-4480,-50020] 2 [83:396:1] 20640j3 [0,1,0,-37160,2744808] 4 [-134:2310:1] 20640j4 [0,1,0,-305,114495] 2 [13:336:1]
20640k (1 curve)	1	2+ 3- 5- 43+	2+ 3- 5- -1  0 -3  0 -3
Curve Equation t Generators 20640k1 [0,1,0,40,120] 1 [-2:6:1]
20640l (2 curves)	0	2+ 3- 5- 43-	2+ 3- 5-  4  2  6  0 -2
Curve Equation t 20640l1 [0,1,0,-130,128] 2 20640l2 [0,1,0,495,1503] 2
20640m (2 curves)	0	2- 3+ 5+ 43+	2- 3+ 5+ -2  2  6  0 -2
Curve Equation t 20640m1 [0,-1,0,-46,-104] 2 20640m2 [0,-1,0,-96,216] 2
20640n (2 curves)	0	2- 3+ 5+ 43+	2- 3+ 5+ -2 -2 -2 -4  2
Curve Equation t 20640n1 [0,-1,0,-334206,-68916744] 2 20640n2 [0,-1,0,-1115456,373583256] 2
20640o (2 curves)	0	2- 3+ 5+ 43+	2- 3+ 5+  4  0 -4  4 -4
Curve Equation t 20640o1 [0,-1,0,54,0] 2 20640o2 [0,-1,0,-216,216] 2
20640p (2 curves)	1	2- 3+ 5+ 43-	2- 3+ 5+ -2  6  2 -4  6
Curve Equation t Generators 20640p1 [0,-1,0,-3566,83016] 2 [18:156:1] 20640p2 [0,-1,0,-4816,21016] 2 [111:962:27]
20640q (2 curves)	1	2- 3+ 5+ 43-	2- 3+ 5+ -4  6 -2 -8 -6
Curve Equation t Generators 20640q1 [0,-1,0,-1546,23920] 2 [18:40:1] 20640q2 [0,-1,0,-1521,24705] 2 [9:108:1]
20640r (2 curves)	1	2- 3+ 5- 43+	2- 3+ 5- -4 -2  6  0  2
Curve Equation t Generators 20640r1 [0,-1,0,-130,-128] 2 [-6:20:1] 20640r2 [0,-1,0,495,-1503] 2 [9:60:1]
20640s (4 curves)	0	2- 3+ 5- 43-	2- 3+ 5-  0 -4 -6  2  0
Curve Equation t 20640s1 [0,-1,0,-2330,-42000] 4 20640s2 [0,-1,0,-37160,-2744808] 2 20640s3 [0,-1,0,-4480,50020] 2 20640s4 [0,-1,0,-305,-114495] 4
20640t (4 curves)	1	2- 3- 5+ 43+	2- 3- 5+  0 -4 -2  2  4
Curve Equation t Generators 20640t1 [0,1,0,-466,920] 4 [26:84:1] 20640t2 [0,1,0,-4336,-110536] 2 [155:1722:1] 20640t3 [0,1,0,-5841,169695] 4 [-63:540:1] 20640t4 [0,1,0,1784,9020] 2 [58:1197:8]
20640u (2 curves)	1	2- 3- 5+ 43+	2- 3- 5+  2 -6  2 -4 -6
Curve Equation t Generators 20640u1 [0,1,0,-3566,-83016] 2 [-35:12:1] 20640u2 [0,1,0,-4816,-21016] 2 [-58:258:1]
20640v (2 curves)	0	2- 3- 5+ 43-	2- 3- 5+  2  2 -2 -4 -2
Curve Equation t 20640v1 [0,1,0,-334206,68916744] 2 20640v2 [0,1,0,-1115456,-373583256] 2
20640w (2 curves)	0	2- 3- 5+ 43-	2- 3- 5+  2 -2  6  0  2
Curve Equation t 20640w1 [0,1,0,-46,104] 2 20640w2 [0,1,0,-96,-216] 2
20640x (2 curves)	1	2- 3- 5- 43-	2- 3- 5-  2  0  2  2 -8
Curve Equation t Generators 20640x1 [0,1,0,-370,2600] 2 [5:30:1] 20640x2 [0,1,0,-120,6300] 2 [15:90:1]

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