Cremona's table of elliptic curves

20216 = 2³ · 7 · 19²

Field	Data	Notes
Atkin-Lehner	2+ 7+ 19-	Signs for the Atkin-Lehner involutions
Conductor	20216	Conductor
Count	4	Number of curves in isogeny class
Curves	20216b1 20216b2 20216b3 20216b4	Curves in isogeny class
deg	12096	Modular degree for the optimal curve
Eigenvalues	2+  0  2 7+ -4 -2 -6 19-	Hecke eigenvalues for primes less than 20
L	0.52678703663933	L(r)(E,1)/r!
r	0	Rank of the group of rational points
Twists	40432j 56a	Quadratic twists by: -4 -19

Hecke Eigenvalues for isogeny class 20216b

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	2	+	-4	-2	-6	-	0	-6	-8	2	-2	-4	-8	-6	0	-6	4	8	10	-16	8	6	6

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Quadratic twists for isogeny class 20216b

-4	-19
40432j	56a

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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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