Cremona's table of elliptic curves

21660 = 2² · 3 · 5 · 19²

Field	Data	Notes
Atkin-Lehner	2- 3+ 5+ 19+	Signs for the Atkin-Lehner involutions
Class	21660b	Isogeny class
Conductor	21660	Conductor
∏ cp	6	Product of Tamagawa factors cp
deg	4800	Modular degree for the optimal curve
Δ	1646160 = 24 · 3 · 5 · 193	Discriminant
Eigenvalues	2- 3+ 5+ -2 -6  2 -2 19+	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-101,-354]	[a1,a2,a3,a4,a6]
Generators	[-5:1:1] [19:65:1]	Generators of the group modulo torsion
j	1048576/15	j-invariant
L	5.9157975142223	L(r)(E,1)/r!
Ω	1.5060439731054	Real period
R	2.6186918044295	Regulator
r	2	Rank of the group of rational points
S	0.99999999999999	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	86640cx1 64980bb1 108300bp1 21660t1	Quadratic twists by: -4 -3 5 -19

Hecke Eigenvalues for elliptic curve 21660b1

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	-6	2	-2	+	4	-10	-4	-10	-2	-2	-12	-12	4	2	4	8	-2	-8	-4	-10	-6

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Quadratic twists for elliptic curve 21660b1

-4	-3	5	-19
86640cx1	64980bb1	108300bp1	21660t1

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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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