Cremona's table of elliptic curves

20800 = 2⁶ · 5² · 13

Field	Data	Notes
Atkin-Lehner	2+ 5+ 13+	Signs for the Atkin-Lehner involutions
Class	20800r	Isogeny class
Conductor	20800	Conductor
∏ cp	4	Product of Tamagawa factors cp
Δ	-514035851264000000 = -1 · 219 · 56 · 137	Discriminant
Eigenvalues	2+ -3 5+ -1  2 13+  3 -6	Hecke eigenvalues for primes up to 20
Equation	[0,0,0,-340300,-83834000]	[a1,a2,a3,a4,a6]
Generators	[27642:683488:27]	Generators of the group modulo torsion
j	-1064019559329/125497034	j-invariant
L	2.8139600074303	L(r)(E,1)/r!
Ω	0.098183242630881	Real period
R	7.1650719919931	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	20800cs2 650f2 832f2	Quadratic twists by: -4 8 5

Hecke Eigenvalues for elliptic curve 20800r2

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
+	-3	+	-1	2	+	3	-6	4	-2	4	3	0	-5	-13	12	10	8	-2	-5	10	-4	0	6	-14

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Quadratic twists for elliptic curve 20800r2

-4	8	5
20800cs2	650f2	832f2

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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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