Cremona's table of elliptic curves

21440 = 2⁶ · 5 · 67

Field	Data	Notes
Atkin-Lehner	2+ 5- 67+	Signs for the Atkin-Lehner involutions
Class	21440l	Isogeny class
Conductor	21440	Conductor
∏ cp	20	Product of Tamagawa factors cp
deg	25600	Modular degree for the optimal curve
Δ	-27443200000 = -1 · 217 · 55 · 67	Discriminant
Eigenvalues	2+ -2 5- -3 -1  0  0 -6	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,-5825,169375]	[a1,a2,a3,a4,a6]
Generators	[-85:240:1] [10:335:1]	Generators of the group modulo torsion
j	-166792350818/209375	j-invariant
L	5.5032395383542	L(r)(E,1)/r!
Ω	1.1818066520086	Real period
R	0.23283163658802	Regulator
r	2	Rank of the group of rational points
S	0.9999999999998	(Analytic) order of Ш
t	1	Number of elements in the torsion subgroup
Twists	21440be1 2680e1 107200s1	Quadratic twists by: -4 8 5

Hecke Eigenvalues for elliptic curve 21440l1

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	-	-3	-1	0	0	-6	-8	6	-6	-1	-12	-8	0	-6	4	-1	+	-9	-14	-10	11	13	7

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Quadratic twists for elliptic curve 21440l1

-4	8	5
21440be1	2680e1	107200s1

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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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