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	21840bz	Isogeny class
Conductor	21840	Conductor
∏ cp	128	Product of Tamagawa factors cp
Δ	-6358354329600 = -1 · 215 · 38 · 52 · 7 · 132	Discriminant
Eigenvalues	2- 3- 5+ 7-  2 13-  0 -4	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,3024,-102060]	[a1,a2,a3,a4,a6]
Generators	[66:624:1]	Generators of the group modulo torsion
j	746389464911/1552332600	j-invariant
L	6.385736848968	L(r)(E,1)/r!
Ω	0.39175810716536	Real period
R	0.50938135773159	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	2730s2 87360fj2 65520el2 109200cv2	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 21840bz2

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

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Quadratic twists for elliptic curve 21840bz2

-4	8	-3	5
2730s2	87360fj2	65520el2	109200cv2

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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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