Cremona's table of elliptic curves

20216 = 2³ · 7 · 19²

Field	Data	Notes
Atkin-Lehner	2+ 7+ 19-	Signs for the Atkin-Lehner involutions
Class	20216b	Isogeny class
Conductor	20216	Conductor
∏ cp	4	Product of Tamagawa factors cp
Δ	231336264255488 = 211 · 74 · 196	Discriminant
Eigenvalues	2+  0  2 7+ -4 -2 -6 19-	Hecke eigenvalues for primes up to 20
Equation	[0,0,0,-21299,946542]	[a1,a2,a3,a4,a6]
j	11090466/2401	j-invariant
L	0.52678703663933	L(r)(E,1)/r!
Ω	0.52678703663934	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	40432j3 56a3	Quadratic twists by: -4 -19

Hecke Eigenvalues for elliptic curve 20216b4

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

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Quadratic twists for elliptic curve 20216b4

-4	-19
40432j3	56a3

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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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