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	21840cj	Isogeny class
Conductor	21840	Conductor
∏ cp	192	Product of Tamagawa factors cp
Δ	-196245504000000 = -1 · 217 · 34 · 56 · 7 · 132	Discriminant
Eigenvalues	2- 3- 5- 7-  2 13+ -8 -4	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,14240,-158092]	[a1,a2,a3,a4,a6]
Generators	[26:480:1]	Generators of the group modulo torsion
j	77958456780959/47911500000	j-invariant
L	7.0017271361535	L(r)(E,1)/r!
Ω	0.3271272236864	Real period
R	0.4459100459226	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	2730u2 87360et2 65520cz2 109200dh2	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 21840cj2

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	+	-8	-4	4	-6	-6	-2	4	10	12	-8	-4	-14	-12	0	14	16	-4	12	-6

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Quadratic twists for elliptic curve 21840cj2

-4	8	-3	5
2730u2	87360et2	65520cz2	109200dh2

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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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