Cremona's table of elliptic curves

21840 = 2⁴ · 3 · 5 · 7 · 13

Field	Data	Notes
Atkin-Lehner	2- 3- 5- 7- 13-	Signs for the Atkin-Lehner involutions
Class	21840ck	Isogeny class
Conductor	21840	Conductor
∏ cp	16	Product of Tamagawa factors cp
Δ	-1403317873950720 = -1 · 214 · 3 · 5 · 7 · 138	Discriminant
Eigenvalues	2- 3- 5- 7-  4 13-  2 -4	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,26320,-731052]	[a1,a2,a3,a4,a6]
j	492271755328079/342606902820	j-invariant
L	4.3397628832922	L(r)(E,1)/r!
Ω	0.27123518020576	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	4	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	2730w4 87360eq3 65520dg3 109200cy3	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 21840ck3

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	-	2	-4	0	6	8	6	10	-4	0	6	-4	6	4	0	-6	0	-12	-6	2

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Quadratic twists for elliptic curve 21840ck3

-4	8	-3	5
2730w4	87360eq3	65520dg3	109200cy3

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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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