Cremona's table of elliptic curves

21216 = 2⁵ · 3 · 13 · 17

Field	Data	Notes
Atkin-Lehner	2- 3- 13+ 17+	Signs for the Atkin-Lehner involutions
Class	21216m	Isogeny class
Conductor	21216	Conductor
∏ cp	8	Product of Tamagawa factors cp
deg	2560	Modular degree for the optimal curve
Δ	1654848 = 26 · 32 · 132 · 17	Discriminant
Eigenvalues	2- 3-  2  0 -2 13+ 17+  4	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,-42,72]	[a1,a2,a3,a4,a6]
Generators	[-6:12:1]	Generators of the group modulo torsion
j	131096512/25857	j-invariant
L	7.1281704057791	L(r)(E,1)/r!
Ω	2.5250361034114	Real period
R	1.4114987100875	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	21216a1 42432h1 63648h1	Quadratic twists by: -4 8 -3

Hecke Eigenvalues for elliptic curve 21216m1

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
-	-	2	0	-2	+	+	4	-6	8	-4	-6	-12	4	0	6	4	4	12	-12	-4	2	0	-6	-12

---

Quadratic twists for elliptic curve 21216m1

-4	8	-3
21216a1	42432h1	63648h1

---

Data from Elliptic Curve Data by J. E. Cremona.
Design inspired by The Modular Forms Explorer by William Stein.

Part of Computational Number Theory
Back to Tables and computations