Cremona's table of elliptic curves

21780 = 2² · 3² · 5 · 11²

Field	Data	Notes
Atkin-Lehner	2- 3+ 5+ 11-	Signs for the Atkin-Lehner involutions
Class	21780b	Isogeny class
Conductor	21780	Conductor
∏ cp	18	Product of Tamagawa factors cp
deg	25344	Modular degree for the optimal curve
Δ	-463015182960 = -1 · 24 · 33 · 5 · 118	Discriminant
Eigenvalues	2- 3+ 5+  0 11- -6  7 -4	Hecke eigenvalues for primes up to 20
Equation	[0,0,0,-3993,-102487]	[a1,a2,a3,a4,a6]
Generators	[121:1089:1]	Generators of the group modulo torsion
j	-76032/5	j-invariant
L	4.5949766074438	L(r)(E,1)/r!
Ω	0.29915640654673	Real period
R	0.853321114323	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	1	Number of elements in the torsion subgroup
Twists	87120cv1 21780d1 108900b1 21780a1	Quadratic twists by: -4 -3 5 -11

Hecke Eigenvalues for elliptic curve 21780b1

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	7	-4	3	4	3	0	-2	4	-7	-5	4	1	2	-10	-4	-5	12	0	6

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Quadratic twists for elliptic curve 21780b1

-4	-3	5	-11
87120cv1	21780d1	108900b1	21780a1

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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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