Cremona's table of elliptic curves

20748 = 2² · 3 · 7 · 13 · 19

Field	Data	Notes
Atkin-Lehner	2- 3- 7- 13- 19+	Signs for the Atkin-Lehner involutions
Class	20748t	Isogeny class
Conductor	20748	Conductor
∏ cp	2160	Product of Tamagawa factors cp
deg	725760	Modular degree for the optimal curve
Δ	-9.1721740321729E+20	Discriminant
Eigenvalues	2- 3-  0 7-  2 13- -4 19+	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,1421727,1303335504]	[a1,a2,a3,a4,a6]
Generators	[-597:15561:1]	Generators of the group modulo torsion
j	19863329986832340992000/57326087701080650907	j-invariant
L	6.800152636569	L(r)(E,1)/r!
Ω	0.11064287177497	Real period
R	0.11381551338	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	82992bu1 62244bg1	Quadratic twists by: -4 -3

Hecke Eigenvalues for elliptic curve 20748t1

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	+	6	-2	8	-6	0	-12	-8	-6	-12	-2	12	-6	-2	-16	8	8	-6

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Quadratic twists for elliptic curve 20748t1

-4	-3
82992bu1	62244bg1

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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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