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	21840cb	Isogeny class
Conductor	21840	Conductor
∏ cp	640	Product of Tamagawa factors cp
Δ	2.1155437046016E+23	Discriminant
Eigenvalues	2- 3- 5+ 7- -4 13- -6  8	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,-157753016,-762362743980]	[a1,a2,a3,a4,a6]
Generators	[-7364:6786:1]	Generators of the group modulo torsion
j	105997782562506306791694649/51649016225625000000	j-invariant
L	5.7395824824246	L(r)(E,1)/r!
Ω	0.042600808122461	Real period
R	3.3682356834203	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	4	Number of elements in the torsion subgroup
Twists	2730c2 87360fl2 65520en2 109200da2	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 21840cb2

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	-	-6	8	-8	2	-8	2	-2	8	12	10	-4	2	8	-4	-6	8	-4	14	-14

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Quadratic twists for elliptic curve 21840cb2

-4	8	-3	5
2730c2	87360fl2	65520en2	109200da2

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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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