Cremona's table of elliptic curves

1984 = 2⁶ · 31

Field	Data	Notes
Atkin-Lehner	2+ 31+	Signs for the Atkin-Lehner involutions
Class	1984c	Isogeny class
Conductor	1984	Conductor
∏ cp	1	Product of Tamagawa factors cp
deg	128	Modular degree for the optimal curve
Δ	-31744 = -1 · 210 · 31	Discriminant
Eigenvalues	2+  2 -1 -3  2  2 -6 -1	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-1,9]	[a1,a2,a3,a4,a6]
Generators	[0:3:1]	Generators of the group modulo torsion
j	-256/31	j-invariant
L	3.6161848425807	L(r)(E,1)/r!
Ω	3.036170607507	Real period
R	1.1910347968061	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	1984k1 248a1 17856l1 49600m1	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 1984c1

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	-1	-3	2	2	-6	-1	-6	-4	+	2	7	-4	8	-8	-3	6	12	3	-10	-12	-2	-16	-7

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Quadratic twists for elliptic curve 1984c1

-4	8	-3	5	-7	-31
1984k1	248a1	17856l1	49600m1	97216ba1	61504x1

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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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