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	21216d	Isogeny class
Conductor	21216	Conductor
∏ cp	48	Product of Tamagawa factors cp
deg	64512	Modular degree for the optimal curve
Δ	8561172439872 = 26 · 36 · 133 · 174	Discriminant
Eigenvalues	2+ 3+ -4  2  4 13- 17-  2	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-5530,74236]	[a1,a2,a3,a4,a6]
Generators	[84:442:1]	Generators of the group modulo torsion
j	292279034436544/133768319373	j-invariant
L	3.8244290004015	L(r)(E,1)/r!
Ω	0.65787654046992	Real period
R	0.48444107229067	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	21216h1 42432ch2 63648u1	Quadratic twists by: -4 8 -3

Hecke Eigenvalues for elliptic curve 21216d1

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	2	4	-	-	2	8	-10	2	-2	-4	-4	0	-6	-4	2	-2	8	-6	12	4	-12	-14

---

Quadratic twists for elliptic curve 21216d1

-4	8	-3
21216h1	42432ch2	63648u1

---

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