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	1240b	Isogeny class
Conductor	1240	Conductor
∏ cp	4	Product of Tamagawa factors cp
deg	96	Modular degree for the optimal curve
Δ	-198400 = -1 · 28 · 52 · 31	Discriminant
Eigenvalues	2+  2 5+  0  0  4  0  4	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,4,20]	[a1,a2,a3,a4,a6]
j	21296/775	j-invariant
L	2.4011990028242	L(r)(E,1)/r!
Ω	2.4011990028242	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	2480c1 9920p1 11160r1 6200l1	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 1240b1

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

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Quadratic twists for elliptic curve 1240b1

-4	8	-3	5	-7	-31
2480c1	9920p1	11160r1	6200l1	60760h1	38440c1

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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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