Cremona's table of elliptic curves

1240 = 2³ · 5 · 31

Field	Data	Notes
Atkin-Lehner	2- 5+ 31+	Signs for the Atkin-Lehner involutions
Class	1240d	Isogeny class
Conductor	1240	Conductor
∏ cp	8	Product of Tamagawa factors cp
Δ	-124000000 = -1 · 28 · 56 · 31	Discriminant
Eigenvalues	2-  2 5+ -4  4  4  4  4	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,124,-124]	[a1,a2,a3,a4,a6]
j	817036976/484375	j-invariant
L	2.1747560408699	L(r)(E,1)/r!
Ω	1.087378020435	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	2480d2 9920k2 11160h2 6200c2	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 1240d2

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
-	2	+	-4	4	4	4	4	2	2	+	8	-6	10	0	0	4	2	8	-16	0	-16	18	6	-10

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Quadratic twists for elliptic curve 1240d2

-4	8	-3	5	-7	-31
2480d2	9920k2	11160h2	6200c2	60760ba2	38440j2

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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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