Cremona's table of elliptic curves

21930 = 2 · 3 · 5 · 17 · 43

Field	Data	Notes
Atkin-Lehner	2- 3+ 5- 17- 43-	Signs for the Atkin-Lehner involutions
Class	21930bf	Isogeny class
Conductor	21930	Conductor
∏ cp	224	Product of Tamagawa factors cp
deg	71680	Modular degree for the optimal curve
Δ	26071787520000 = 214 · 34 · 54 · 17 · 432	Discriminant
Eigenvalues	2- 3+ 5-  2  2 -6 17- -4	Hecke eigenvalues for primes up to 20
Equation	[1,1,1,-16095,739845]	[a1,a2,a3,a4,a6]
Generators	[403:7538:1]	Generators of the group modulo torsion
j	461103418142394481/26071787520000	j-invariant
L	7.653337553528	L(r)(E,1)/r!
Ω	0.65916573226795	Real period
R	0.20733289874925	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	65790s1 109650r1	Quadratic twists by: -3 5

Hecke Eigenvalues for elliptic curve 21930bf1

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	2	-6	-	-4	0	2	0	-2	-6	-	0	-14	0	14	-4	2	-4	8	-12	6	14

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Quadratic twists for elliptic curve 21930bf1

-3	5
65790s1	109650r1

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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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