Cremona's table of elliptic curves

4221 = 3² · 7 · 67

Field	Data	Notes
Atkin-Lehner	3- 7+ 67-	Signs for the Atkin-Lehner involutions
Class	4221d	Isogeny class
Conductor	4221	Conductor
∏ cp	16	Product of Tamagawa factors cp
Δ	204606973032410529 = 318 · 76 · 672	Discriminant
Eigenvalues	1 3- -2 7+  4  2  6 -8	Hecke eigenvalues for primes up to 20
Equation	[1,-1,0,-168588,15412275]	[a1,a2,a3,a4,a6]
Generators	[188702278:12932804849:39304]	Generators of the group modulo torsion
j	726904920233564353/280668001416201	j-invariant
L	3.8851681768327	L(r)(E,1)/r!
Ω	0.2887607914689	Real period
R	13.454625044727	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	4	Number of elements in the torsion subgroup
Twists	67536bw2 1407c2 105525x2 29547y2	Quadratic twists by: -4 -3 5 -7

Hecke Eigenvalues for elliptic curve 4221d2

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	+	4	2	6	-8	0	2	8	-10	-6	4	4	2	0	-14	-	0	2	-8	-16	14	-18

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Quadratic twists for elliptic curve 4221d2

-4	-3	5	-7
67536bw2	1407c2	105525x2	29547y2

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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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