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	21840v	Isogeny class
Conductor	21840	Conductor
∏ cp	8	Product of Tamagawa factors cp
deg	10240	Modular degree for the optimal curve
Δ	767719680 = 28 · 3 · 5 · 7 · 134	Discriminant
Eigenvalues	2+ 3- 5- 7-  0 13- -6  0	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,-260,828]	[a1,a2,a3,a4,a6]
Generators	[18:48:1]	Generators of the group modulo torsion
j	7622072656/2998905	j-invariant
L	7.0493439751957	L(r)(E,1)/r!
Ω	1.4520485133926	Real period
R	2.4273789443595	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	10920m1 87360en1 65520z1 109200a1	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 21840v1

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

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Quadratic twists for elliptic curve 21840v1

-4	8	-3	5
10920m1	87360en1	65520z1	109200a1

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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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