Cremona's table of elliptic curves

21240 = 2³ · 3² · 5 · 59

Field	Data	Notes
Atkin-Lehner	2+ 3- 5+ 59+	Signs for the Atkin-Lehner involutions
Class	21240c	Isogeny class
Conductor	21240	Conductor
∏ cp	8	Product of Tamagawa factors cp
deg	16384	Modular degree for the optimal curve
Δ	16443965520 = 24 · 310 · 5 · 592	Discriminant
Eigenvalues	2+ 3- 5+  4  0  4 -6  4	Hecke eigenvalues for primes up to 20
Equation	[0,0,0,-1038,11297]	[a1,a2,a3,a4,a6]
j	10603964416/1409805	j-invariant
L	2.3813334817909	L(r)(E,1)/r!
Ω	1.1906667408955	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	42480j1 7080j1 106200bg1	Quadratic twists by: -4 -3 5

Hecke Eigenvalues for elliptic curve 21240c1

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
+	-	+	4	0	4	-6	4	-6	-2	4	-8	-6	2	-6	10	+	2	-10	-8	8	0	14	10	-4

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Quadratic twists for elliptic curve 21240c1

-4	-3	5
42480j1	7080j1	106200bg1

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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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