Cremona's table of elliptic curves

21488 = 2⁴ · 17 · 79

Field	Data	Notes
Atkin-Lehner	2- 17- 79+	Signs for the Atkin-Lehner involutions
Class	21488i	Isogeny class
Conductor	21488	Conductor
∏ cp	6	Product of Tamagawa factors cp
deg	69696	Modular degree for the optimal curve
Δ	488158195456 = 28 · 176 · 79	Discriminant
Eigenvalues	2- -3  3 -3  2 -5 17- -6	Hecke eigenvalues for primes up to 20
Equation	[0,0,0,-11311,-461798]	[a1,a2,a3,a4,a6]
Generators	[-62:34:1]	Generators of the group modulo torsion
j	625153625235792/1906867951	j-invariant
L	2.967566871377	L(r)(E,1)/r!
Ω	0.46302446660223	Real period
R	1.0681821679797	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	1	Number of elements in the torsion subgroup
Twists	5372b1 85952u1	Quadratic twists by: -4 8

Hecke Eigenvalues for elliptic curve 21488i1

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
-	-3	3	-3	2	-5	-	-6	-4	0	4	2	-4	-4	3	0	13	6	8	9	-6	+	4	17	7

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Quadratic twists for elliptic curve 21488i1

-4	8
5372b1	85952u1

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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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