Cremona's table of elliptic curves

23998 = 2 · 13² · 71

Class	r	Atkin-Lehner	Eigenvalues
23998a (2 curves)	1	2+ 13+ 71+	2+  1  0 -1  0 13+  6 -4
Curve Equation t Generators 23998a1 [1,0,1,-511,4396] 3 [-2982:21715:216] 23998a2 [1,0,1,-1356,-13518] 1 [-12:38:1]
23998b (1 curve)	1	2+ 13+ 71+	2+  2 -1  4  0 13+  1 -2
Curve Equation t Generators 23998b1 [1,1,0,-386168,-94730176] 1 [69023546256:-1797329626072:63521199]
23998c (1 curve)	1	2+ 13+ 71+	2+ -3  4  3  0 13+  0  5
Curve Equation t Generators 23998c1 [1,-1,0,-1975,27613] 1 [9:98:1]
23998d (2 curves)	0	2+ 13+ 71-	2+  1  0  1  0 13+  0  1
Curve Equation t 23998d1 [1,0,1,-1356,18930] 1 23998d2 [1,0,1,-9806,-363686] 1
23998e (1 curve)	0	2+ 13+ 71-	2+  1 -2  4  2 13+ -2  3
Curve Equation t 23998e1 [1,0,1,-82,-284] 1
23998f (1 curve)	0	2+ 13+ 71-	2+  2  0 -2 -5 13+  0  0
Curve Equation t 23998f1 [1,1,0,-3890,-162508] 1
23998g (2 curves)	0	2- 13+ 71+	2-  0 -2  0 -6 13+  6  8
Curve Equation t 23998g1 [1,-1,1,-201,-7159] 2 23998g2 [1,-1,1,-6961,-220775] 2
23998h (1 curve)	0	2- 13+ 71+	2-  1  2 -4 -2 13+ -2 -3
Curve Equation t 23998h1 [1,0,0,-13777,-609623] 1
23998i (1 curve)	0	2- 13+ 71+	2-  2  0  2  5 13+  0  0
Curve Equation t 23998i1 [1,1,1,-23,-83] 1
23998j (1 curve)	0	2- 13+ 71+	2-  3 -2  3  6 13+  6 -1
Curve Equation t 23998j1 [1,-1,1,-443826,113448625] 1
23998k (2 curves)	1	2- 13+ 71-	2-  1  0  1  0 13+  6  4
Curve Equation t Generators 23998k1 [1,0,0,-86278,9744838] 1 [1199194722:1963009369:7762392] 23998k2 [1,0,0,-229083,-29469415] 1 [-5460:81895:27]
23998l (1 curve)	1	2- 13+ 71-	2- -1  2  1  2 13+ -6 -5
Curve Equation t Generators 23998l1 [1,1,1,-257,-1071] 1 [-966:1121:216]
23998m (1 curve)	1	2- 13+ 71-	2-  2  1 -4  0 13+  1  2
Curve Equation t Generators 23998m1 [1,1,1,-2285,-43997] 1 [191:2460:1]

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