Cremona's table of elliptic curves

240 = 2⁴ · 3 · 5

Field	Data	Notes
Atkin-Lehner	2+ 3+ 5-	Signs for the Atkin-Lehner involutions
Class	240a	Isogeny class
Conductor	240	Conductor
∏ cp	2	Product of Tamagawa factors cp
deg	16	Modular degree for the optimal curve
Δ	720 = 24 · 32 · 5	Discriminant
Eigenvalues	2+ 3+ 5-  0  4  6 -6  4	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-15,-18]	[a1,a2,a3,a4,a6]
j	24918016/45	j-invariant
L	1.2064449969911	L(r)(E,1)/r!
Ω	2.4128899939821	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	120a1 960l1 720c1 1200e1	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 240a1

a2	a3	a5	a7	a11	a13	a17	a19	a23	a29	a31	a37	a41	a43	a47	a53	a59	a61	a67	a71	a73	a79	a83	a89	a97
+	+	-	0	4	6	-6	4	0	-2	8	-2	-6	-12	-8	6	-12	14	-4	-8	-6	8	12	10	2

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Quadratic twists for elliptic curve 240a1

-4	8	-3	5	-7	-11	13	17	-19	-23
120a1	960l1	720c1	1200e1	11760x1	29040o1	40560a1	69360x1	86640ba1	126960b1

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

Part of Computational Number Theory
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