Cremona's table of elliptic curves

5580 = 2² · 3² · 5 · 31

Class	r	Atkin-Lehner	Eigenvalues
5580a (2 curves)	1	2- 3- 5+ 31+	2- 3- 5+  0  0 -2  4 -4
Curve Equation t Generators 5580a1 [0,0,0,132,-1267] 2 [19:90:1] 5580a2 [0,0,0,-1263,-14938] 2 [-26:18:1]
5580b (2 curves)	1	2- 3- 5+ 31+	2- 3- 5+  2  4  4 -4 -8
Curve Equation t Generators 5580b1 [0,0,0,-228,-767] 2 [-4:9:1] 5580b2 [0,0,0,-1623,24622] 2 [-1:162:1]
5580c (1 curve)	1	2- 3- 5+ 31+	2- 3- 5+ -2 -2  2  3 -3
Curve Equation t Generators 5580c1 [0,0,0,72,-108] 1 [13:55:1]
5580d (2 curves)	1	2- 3- 5+ 31+	2- 3- 5+ -2  4 -4  0  0
Curve Equation t Generators 5580d1 [0,0,0,-9468,-354483] 2 [32555:481616:125] 5580d2 [0,0,0,-10863,-243162] 2 [-78:360:1]
5580e (2 curves)	0	2- 3- 5+ 31-	2- 3- 5+ -2  4 -4  0  0
Curve Equation t 5580e1 [0,0,0,-1308,17917] 2 5580e2 [0,0,0,-2703,-27002] 2
5580f (2 curves)	1	2- 3- 5- 31-	2- 3- 5- -4  0  2  3 -7
Curve Equation t Generators 5580f1 [0,0,0,-912,-10604] 1 [37485:204191:729] 5580f2 [0,0,0,528,-39836] 3 [108:1130:1]

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