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	21840ch	Isogeny class
Conductor	21840	Conductor
∏ cp	192	Product of Tamagawa factors cp
deg	49152	Modular degree for the optimal curve
Δ	-27518400000000 = -1 · 212 · 33 · 58 · 72 · 13	Discriminant
Eigenvalues	2- 3- 5- 7+ -4 13-  2  4	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,2400,-247500]	[a1,a2,a3,a4,a6]
Generators	[90:840:1]	Generators of the group modulo torsion
j	373092501599/6718359375	j-invariant
L	6.46887389672	L(r)(E,1)/r!
Ω	0.32450562067501	Real period
R	0.41530314914525	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	1365b1 87360dy1 65520cu1 109200dt1	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 21840ch1

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

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Quadratic twists for elliptic curve 21840ch1

-4	8	-3	5
1365b1	87360dy1	65520cu1	109200dt1

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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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