Cremona's table of elliptic curves

20808 = 2³ · 3² · 17²

Field	Data	Notes
Atkin-Lehner	2- 3+ 17-	Signs for the Atkin-Lehner involutions
Class	20808ba	Isogeny class
Conductor	20808	Conductor
∏ cp	6	Product of Tamagawa factors cp
deg	146880	Modular degree for the optimal curve
Δ	-281198251440543744 = -1 · 211 · 39 · 178	Discriminant
Eigenvalues	2- 3+  3  0 -1  0 17- -2	Hecke eigenvalues for primes up to 20
Equation	[0,0,0,-132651,-31570938]	[a1,a2,a3,a4,a6]
Generators	[54726774:1669483062:50653]	Generators of the group modulo torsion
j	-918	j-invariant
L	6.4614841764126	L(r)(E,1)/r!
Ω	0.11993767443025	Real period
R	8.9789470616124	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	41616m1 20808g1 20808x1	Quadratic twists by: -4 -3 17

Hecke Eigenvalues for elliptic curve 20808ba1

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	0	-1	0	-	-2	4	-3	-5	8	-6	-4	-2	1	3	-6	-10	-6	5	-7	4	-2	3

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Quadratic twists for elliptic curve 20808ba1

-4	-3	17
41616m1	20808g1	20808x1

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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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