Cremona's table of elliptic curves

8281 = 7² · 13²

Field	Data	Notes
Atkin-Lehner	7- 13+	Signs for the Atkin-Lehner involutions
Class	8281f	Isogeny class
Conductor	8281	Conductor
∏ cp	4	Product of Tamagawa factors cp
deg	70560	Modular degree for the optimal curve
Δ	-17724902963955733 = -1 · 710 · 137	Discriminant
Eigenvalues	-1  0  0 7-  3 13+ -7 -7	Hecke eigenvalues for primes up to 20
Equation	[1,-1,1,-887620,-321717756]	[a1,a2,a3,a4,a6]
j	-56723625/13	j-invariant
L	0.31107624481092	L(r)(E,1)/r!
Ω	0.07776906120273	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	1	Number of elements in the torsion subgroup
Twists	74529w1 8281b1 637c1	Quadratic twists by: -3 -7 13

Hecke Eigenvalues for elliptic curve 8281f1

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	0	0	-	3	+	-7	-7	-6	-5	0	-8	0	2	7	-3	-7	7	3	5	14	-6	0	0	-14

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Quadratic twists for elliptic curve 8281f1

-3	-7	13
74529w1	8281b1	637c1

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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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