Cremona's table of elliptic curves

21620 = 2² · 5 · 23 · 47

Field	Data	Notes
Atkin-Lehner	2- 5- 23- 47+	Signs for the Atkin-Lehner involutions
Class	21620b	Isogeny class
Conductor	21620	Conductor
∏ cp	18	Product of Tamagawa factors cp
deg	23328	Modular degree for the optimal curve
Δ	-1625824000 = -1 · 28 · 53 · 23 · 472	Discriminant
Eigenvalues	2-  2 5-  5  2  0 -7  4	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-3565,-80775]	[a1,a2,a3,a4,a6]
j	-19578714136576/6350875	j-invariant
L	5.5604325692133	L(r)(E,1)/r!
Ω	0.30891292051185	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	86480j1 108100f1	Quadratic twists by: -4 5

Hecke Eigenvalues for elliptic curve 21620b1

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	-	5	2	0	-7	4	-	9	3	1	-5	-4	+	1	5	6	7	15	-8	-4	-11	0	14

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Quadratic twists for elliptic curve 21620b1

-4	5
86480j1	108100f1

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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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