Cremona's table of elliptic curves

644 = 2² · 7 · 23

Field	Data	Notes
Atkin-Lehner	2- 7+ 23-	Signs for the Atkin-Lehner involutions
Class	644a	Isogeny class
Conductor	644	Conductor
∏ cp	2	Product of Tamagawa factors cp
deg	48	Modular degree for the optimal curve
Δ	-883568 = -1 · 24 · 74 · 23	Discriminant
Eigenvalues	2-  1 -2 7+ -2 -1  0 -6	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,6,-43]	[a1,a2,a3,a4,a6]
Generators	[13:49:1]	Generators of the group modulo torsion
j	1257728/55223	j-invariant
L	2.1671360619034	L(r)(E,1)/r!
Ω	1.3458310330432	Real period
R	0.80512932481689	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	2576o1 10304c1 5796e1 16100d1	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 644a1

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
-	1	-2	+	-2	-1	0	-6	-	1	1	-6	3	0	-3	6	8	-10	-2	5	-7	14	-4	-12	-8

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Quadratic twists for elliptic curve 644a1

-4	8	-3	5	-7	-11	13	-23
2576o1	10304c1	5796e1	16100d1	4508c1	77924u1	108836h1	14812c1

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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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