Cremona's table of elliptic curves

20448 = 2⁵ · 3² · 71

Class	r	Atkin-Lehner	Eigenvalues
20448a (1 curve)	1	2+ 3+ 71+	2+ 3+  1 -1  1  2 -2  1
Curve Equation t Generators 20448a1 [0,0,0,-4347,110322] 1 [306:27:8]
20448b (1 curve)	1	2+ 3+ 71+	2+ 3+ -1  1  1  2  2 -1
Curve Equation t Generators 20448b1 [0,0,0,-483,4086] 1 [13:2:1]
20448c (1 curve)	0	2+ 3- 71+	2+ 3-  0 -3 -4  5  8 -1
Curve Equation t 20448c1 [0,0,0,-75,34] 1
20448d (1 curve)	0	2+ 3- 71+	2+ 3-  2  1 -2 -7  2 -1
Curve Equation t 20448d1 [0,0,0,-819,-9018] 1
20448e (1 curve)	2	2+ 3- 71+	2+ 3- -3 -3 -1  2 -2 -5
Curve Equation t Generators 20448e1 [0,0,0,141,-1114] 1 [13:54:1]&[37:234:1]
20448f (2 curves)	1	2+ 3- 71-	2+ 3-  2  2  0 -2  4  0
Curve Equation t Generators 20448f1 [0,0,0,-5709,-253460] 2 [8169967586:-52041163095:73034632] 20448f2 [0,0,0,-104124,-12929312] 2 [600919:7539561:1331]
20448g (1 curve)	1	2- 3+ 71-	2- 3+  1  1 -1  2 -2 -1
Curve Equation t Generators 20448g1 [0,0,0,-4347,-110322] 1 [229:3302:1]
20448h (1 curve)	1	2- 3+ 71-	2- 3+ -1 -1 -1  2  2  1
Curve Equation t Generators 20448h1 [0,0,0,-483,-4086] 1 [210:291:8]
20448i (2 curves)	1	2- 3- 71+	2- 3-  2 -2  0 -2  4  0
Curve Equation t Generators 20448i1 [0,0,0,-5709,253460] 2 [77:520:1] 20448i2 [0,0,0,-104124,12929312] 2 [166:468:1]
20448j (2 curves)	1	2- 3- 71+	2- 3- -2 -4 -6  0 -2  4
Curve Equation t Generators 20448j1 [0,0,0,159,-160] 2 [7:36:1] 20448j2 [0,0,0,-651,-1294] 2 [34:126:1]
20448k (1 curve)	0	2- 3- 71-	2- 3-  0  3  4  5  8  1
Curve Equation t 20448k1 [0,0,0,-75,-34] 1
20448l (1 curve)	0	2- 3- 71-	2- 3-  2 -1  2 -7  2  1
Curve Equation t 20448l1 [0,0,0,-819,9018] 1
20448m (2 curves)	0	2- 3- 71-	2- 3- -2  4  6  0 -2 -4
Curve Equation t 20448m1 [0,0,0,159,160] 2 20448m2 [0,0,0,-651,1294] 2
20448n (1 curve)	0	2- 3- 71-	2- 3- -3  3  1  2 -2  5
Curve Equation t 20448n1 [0,0,0,141,1114] 1

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