Cremona's table of elliptic curves

21648 = 2⁴ · 3 · 11 · 41

Field	Data	Notes
Atkin-Lehner	2- 3+ 11+ 41+	Signs for the Atkin-Lehner involutions
Class	21648m	Isogeny class
Conductor	21648	Conductor
∏ cp	4	Product of Tamagawa factors cp
deg	138240	Modular degree for the optimal curve
Δ	6179958816768 = 222 · 33 · 113 · 41	Discriminant
Eigenvalues	2- 3+  0  4 11+  2  6  4	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-490968,-132248592]	[a1,a2,a3,a4,a6]
j	3195392484115617625/1508779008	j-invariant
L	2.8857332213829	L(r)(E,1)/r!
Ω	0.18035832633643	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	16	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	2706g1 86592dg1 64944bq1	Quadratic twists by: -4 8 -3

Hecke Eigenvalues for elliptic curve 21648m1

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
-	+	0	4	+	2	6	4	6	0	4	2	+	-8	0	-6	12	8	4	12	2	-8	12	-6	-10

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Quadratic twists for elliptic curve 21648m1

-4	8	-3
2706g1	86592dg1	64944bq1

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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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