Cremona's table of elliptic curves

208 = 2⁴ · 13

Field	Data	Notes
Atkin-Lehner	2+ 13+	Signs for the Atkin-Lehner involutions
Class	208b	Isogeny class
Conductor	208	Conductor
∏ cp	4	Product of Tamagawa factors cp
deg	16	Modular degree for the optimal curve
Δ	-26624 = -1 · 211 · 13	Discriminant
Eigenvalues	2+ -1 -1 -5  2 13+ -3  2	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-16,32]	[a1,a2,a3,a4,a6]
Generators	[4:-4:1]	Generators of the group modulo torsion
j	-235298/13	j-invariant
L	1.1687186183111	L(r)(E,1)/r!
Ω	3.7085476616213	Real period
R	0.078785465696304	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	104a1 832i1 1872e1 5200f1	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 208b1

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
+	-1	-1	-5	2	+	-3	2	-4	-6	4	11	8	1	-9	-12	-6	0	-6	-7	-2	-12	16	-10	-10

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Quadratic twists for elliptic curve 208b1

-4	8	-3	5	-7	-11	13	17	-19	-23
104a1	832i1	1872e1	5200f1	10192f1	25168h1	2704a1	60112e1	75088j1	110032b1

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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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