Cremona's table of elliptic curves

9920 = 2⁶ · 5 · 31

Field	Data	Notes
Atkin-Lehner	2+ 5- 31+	Signs for the Atkin-Lehner involutions
Class	9920k	Isogeny class
Conductor	9920	Conductor
∏ cp	24	Product of Tamagawa factors cp
Δ	-7936000000 = -1 · 214 · 56 · 31	Discriminant
Eigenvalues	2+ -2 5- -4 -4 -4  4 -4	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,495,-497]	[a1,a2,a3,a4,a6]
Generators	[3:32:1] [11:80:1]	Generators of the group modulo torsion
j	817036976/484375	j-invariant
L	4.2957012000094	L(r)(E,1)/r!
Ω	0.76889237196277	Real period
R	0.93114488595301	Regulator
r	2	Rank of the group of rational points
S	1.0000000000002	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	9920bj2 1240d2 89280bi2 49600k2	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 9920k2

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
+	-2	-	-4	-4	-4	4	-4	2	-2	+	-8	-6	-10	0	0	-4	-2	-8	-16	0	-16	-18	6	-10

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Quadratic twists for elliptic curve 9920k2

-4	8	-3	5
9920bj2	1240d2	89280bi2	49600k2

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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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