Cremona's table of elliptic curves

15540 = 2² · 3 · 5 · 7 · 37

Class	r	Atkin-Lehner	Eigenvalues
15540a (2 curves)	0	2- 3+ 5+ 7+ 37+	2- 3+ 5+ 7+  2  0  6 -6
Curve Equation t 15540a1 [0,-1,0,-148981,22165150] 2 15540a2 [0,-1,0,-114756,32583240] 2
15540b (2 curves)	1	2- 3+ 5+ 7- 37+	2- 3+ 5+ 7-  2 -2  2  0
Curve Equation t Generators 15540b1 [0,-1,0,139,1086] 2 [1:35:1] 15540b2 [0,-1,0,-1156,13000] 2 [-14:162:1]
15540c (2 curves)	1	2- 3+ 5+ 7- 37+	2- 3+ 5+ 7- -2  2 -2 -4
Curve Equation t Generators 15540c1 [0,-1,0,-281,1506] 2 [1:35:1] 15540c2 [0,-1,0,644,8536] 2 [10:126:1]
15540d (2 curves)	1	2- 3+ 5+ 7- 37+	2- 3+ 5+ 7-  6  2 -6  4
Curve Equation t Generators 15540d1 [0,-1,0,-61,490] 2 [18:70:1] 15540d2 [0,-1,0,-1356,19656] 2 [9:90:1]
15540e (2 curves)	2	2- 3+ 5+ 7- 37-	2- 3+ 5+ 7- -4 -4 -6 -8
Curve Equation t Generators 15540e1 [0,-1,0,-301,2110] 2 [38:-210:1]&[-15:55:1] 15540e2 [0,-1,0,-196,3496] 2 [6:50:1]&[30:154:1]
15540f (2 curves)	1	2- 3+ 5- 7+ 37+	2- 3+ 5- 7+ -2  2  2  4
Curve Equation t Generators 15540f1 [0,-1,0,-505,-3950] 2 [-15:5:1] 15540f2 [0,-1,0,420,-17640] 2 [22:42:1]
15540g (1 curve)	1	2- 3+ 5- 7+ 37+	2- 3+ 5- 7+  6 -3  6  0
Curve Equation t Generators 15540g1 [0,-1,0,2232635,-1115635775] 1 [555:17150:1]
15540h (1 curve)	0	2- 3- 5+ 7- 37+	2- 3- 5+ 7- -2 -7  6  0
Curve Equation t 15540h1 [0,1,0,139,135] 1
15540i (2 curves)	1	2- 3- 5- 7+ 37-	2- 3- 5- 7+ -4  4 -2  0
Curve Equation t Generators 15540i1 [0,1,0,-245,900] 2 [-5:45:1] 15540i2 [0,1,0,700,6948] 2 [16:150:1]

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