Cremona's table of elliptic curves

238 = 2 · 7 · 17

Class	r	Atkin-Lehner	Eigenvalues
238b (2 curves)	1	2+ 7+ 17+	2+  0 -2 7+ -2  0 17+ -2
Curve Equation t Generators 238b1 [1,-1,0,2,0] 2 [1:1:1] 238b2 [1,-1,0,-8,6] 2 [-1:4:1]
238e (2 curves)	0	2+ 7- 17+	2+  2  4 7- -4 -4 17+ -6
Curve Equation t 238e1 [1,1,0,32,0] 2 238e2 [1,1,0,-128,-160] 2
238d (2 curves)	0	2- 7+ 17+	2-  2  0 7+ -2 -2 17+  0
Curve Equation t 238d1 [1,1,1,-18,-37] 2 238d2 [1,1,1,-28,-5] 2
238a (2 curves)	1	2- 7- 17+	2- -2 -4 7- -6 -2 17+  0
Curve Equation t Generators 238a1 [1,0,0,-60,16] 2 [-4:16:1] 238a2 [1,0,0,-700,7056] 2 [-14:126:1]
238c (4 curves)	0	2- 7- 17-	2-  0  2 7-  0 -2 17-  4
Curve Equation t 238c1 [1,-1,1,-19,35] 4 238c2 [1,-1,1,-39,-37] 4 238c3 [1,-1,1,-529,-4545] 2 238c4 [1,-1,1,131,-377] 2

Data from Elliptic Curve Data by J. E. Cremona.
Design inspired by The Modular Forms Explorer by William Stein.

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