Cremona's table of elliptic curves

20540 = 2² · 5 · 13 · 79

Field	Data	Notes
Atkin-Lehner	2- 5- 13- 79+	Signs for the Atkin-Lehner involutions
Class	20540b	Isogeny class
Conductor	20540	Conductor
∏ cp	4	Product of Tamagawa factors cp
deg	20736	Modular degree for the optimal curve
Δ	-1025521120000 = -1 · 28 · 54 · 13 · 793	Discriminant
Eigenvalues	2-  0 5-  3  0 13-  2  4	Hecke eigenvalues for primes up to 20
Equation	[0,0,0,1408,44276]	[a1,a2,a3,a4,a6]
j	1205845622784/4005941875	j-invariant
L	2.4809511955861	L(r)(E,1)/r!
Ω	0.62023779889652	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	82160r1 102700a1	Quadratic twists by: -4 5

Hecke Eigenvalues for elliptic curve 20540b1

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	-	3	0	-	2	4	-7	-8	2	-6	7	0	-7	-6	8	10	-14	0	4	+	12	4	4

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Quadratic twists for elliptic curve 20540b1

-4	5
82160r1	102700a1

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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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