Cremona's table of elliptic curves

21840 = 2⁴ · 3 · 5 · 7 · 13

Field	Data	Notes
Atkin-Lehner	2+ 3+ 5- 7- 13-	Signs for the Atkin-Lehner involutions
Class	21840j	Isogeny class
Conductor	21840	Conductor
∏ cp	16	Product of Tamagawa factors cp
deg	12288	Modular degree for the optimal curve
Δ	-5118750000 = -1 · 24 · 32 · 58 · 7 · 13	Discriminant
Eigenvalues	2+ 3+ 5- 7-  4 13-  2 -4	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,65,-3458]	[a1,a2,a3,a4,a6]
j	1869154304/319921875	j-invariant
L	2.5728777918888	L(r)(E,1)/r!
Ω	0.64321944797221	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	10920t1 87360gd1 65520ba1 109200bn1	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 21840j1

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
+	+	-	-	4	-	2	-4	8	-2	0	-10	10	-4	8	6	-4	-10	4	0	-6	8	4	10	-14

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Quadratic twists for elliptic curve 21840j1

-4	8	-3	5
10920t1	87360gd1	65520ba1	109200bn1

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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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