Cremona's table of elliptic curves

20646 = 2 · 3² · 31 · 37

Class	r	Atkin-Lehner	Eigenvalues
20646a (2 curves)	1	2+ 3+ 31+ 37+	2+ 3+  2  0  0  2  0  4
Curve Equation t Generators 20646a1 [1,-1,0,-81756,-7369648] 2 [1066528065064:-6957199622932:3131359847] 20646a2 [1,-1,0,164004,-43299760] 2 [4050952:108425788:6859]
20646b (1 curve)	0	2+ 3+ 31+ 37-	2+ 3+ -1  0  5  3 -3 -7
Curve Equation t 20646b1 [1,-1,0,143220,-69134896] 1
20646c (1 curve)	0	2+ 3+ 31+ 37-	2+ 3+  2  1 -3  5  3  5
Curve Equation t 20646c1 [1,-1,0,444,55574] 1
20646d (1 curve)	2	2+ 3+ 31- 37+	2+ 3+  1 -2 -3 -5 -3 -3
Curve Equation t Generators 20646d1 [1,-1,0,-879,10997] 1 [-7:133:1]&[13:34:1]
20646e (1 curve)	0	2+ 3+ 31- 37+	2+ 3+  1 -2  5  3  1  1
Curve Equation t 20646e1 [1,-1,0,-231054,-77271724] 1
20646f (1 curve)	0	2+ 3+ 31- 37+	2+ 3+ -2  1  3 -5  3  3
Curve Equation t 20646f1 [1,-1,0,-2711057838,-54331397684524] 1
20646g (1 curve)	1	2+ 3- 31+ 37-	2+ 3- -3  4  3  3 -3 -5
Curve Equation t Generators 20646g1 [1,-1,0,-477936,127294848] 1 [399:-186:1]
20646h (1 curve)	1	2+ 3- 31- 37+	2+ 3- -1 -2  3  1 -3  3
Curve Equation t Generators 20646h1 [1,-1,0,-720,32512] 1 [23:155:1]
20646i (1 curve)	1	2+ 3- 31- 37+	2+ 3- -4  1  3  5  3  7
Curve Equation t Generators 20646i1 [1,-1,0,1341,598779] 1 [237:3648:1]
20646j (1 curve)	0	2+ 3- 31- 37-	2+ 3-  0  3  4 -7  2 -2
Curve Equation t 20646j1 [1,-1,0,-792,-8640] 1
20646k (2 curves)	0	2- 3+ 31+ 37+	2- 3+ -2  0  0  2  0  4
Curve Equation t 20646k1 [1,-1,1,-735806,199716301] 2 20646k2 [1,-1,1,1476034,1167617485] 2
20646l (1 curve)	1	2- 3+ 31+ 37-	2- 3+  1  0 -5  3  3 -7
Curve Equation t Generators 20646l1 [1,-1,1,15913,2555247] 1 [35:1758:1]
20646m (1 curve)	1	2- 3+ 31+ 37-	2- 3+ -2  1  3  5 -3  5
Curve Equation t Generators 20646m1 [1,-1,1,49,-2075] 1 [1622:22249:8]
20646n (1 curve)	1	2- 3+ 31- 37+	2- 3+ -1 -2  3 -5  3 -3
Curve Equation t Generators 20646n1 [1,-1,1,-98,-375] 1 [15:29:1]
20646o (1 curve)	1	2- 3+ 31- 37+	2- 3+ -1 -2 -5  3 -1  1
Curve Equation t Generators 20646o1 [1,-1,1,-25673,2870473] 1 [71:1148:1]
20646p (1 curve)	1	2- 3+ 31- 37+	2- 3+  2  1 -3 -5 -3  3
Curve Equation t Generators 20646p1 [1,-1,1,-301228649,2012374397865] 1 [10055:924:1]
20646q (1 curve)	1	2- 3- 31+ 37+	2- 3-  0  1  5  1 -7 -5
Curve Equation t Generators 20646q1 [1,-1,1,-1490,-26031] 1 [77:519:1]
20646r (1 curve)	0	2- 3- 31+ 37-	2- 3-  3  4 -3 -3 -3  1
Curve Equation t 20646r1 [1,-1,1,139,-1897] 1
20646s (1 curve)	0	2- 3- 31+ 37-	2- 3-  3 -4  5  5 -7 -3
Curve Equation t 20646s1 [1,-1,1,-110516,-53484361] 1
20646t (1 curve)	0	2- 3- 31- 37+	2- 3-  0  1  5 -7 -3 -1
Curve Equation t 20646t1 [1,-1,1,-234500,49740639] 1
20646u (1 curve)	2	2- 3- 31- 37+	2- 3- -1 -4 -5 -3 -3 -5
Curve Equation t Generators 20646u1 [1,-1,1,-108563,14987315] 1 [-165:5410:1]&[-105:5074:1]
20646v (1 curve)	0	2- 3- 31- 37+	2- 3-  3  4 -1 -1  3  5
Curve Equation t 20646v1 [1,-1,1,-2006546,-1094576367] 1
20646w (3 curves)	1	2- 3- 31- 37-	2- 3-  0 -1  0  5 -6  2
Curve Equation t Generators 20646w1 [1,-1,1,33340,-2559337] 1 [243:4333:1] 20646w2 [1,-1,1,-327515,113255435] 3 [-405:13594:1] 20646w3 [1,-1,1,-30522290,64911985841] 3 [3897:69727:1]

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