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	21216i	Isogeny class
Conductor	21216	Conductor
∏ cp	16	Product of Tamagawa factors cp
Δ	-43459080469549056 = -1 · 212 · 32 · 132 · 178	Discriminant
Eigenvalues	2- 3+ -2  2  2 13+ 17+  2	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-1447649,670971729]	[a1,a2,a3,a4,a6]
j	-81913199224986275392/10610127067761	j-invariant
L	1.3896287920032	L(r)(E,1)/r!
Ω	0.34740719800081	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	21216e2 42432z1 63648f2	Quadratic twists by: -4 8 -3

Hecke Eigenvalues for elliptic curve 21216i2

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	2	2	+	+	2	8	-6	-10	2	-10	8	6	6	-6	6	10	10	2	-4	6	-10	2

---

Quadratic twists for elliptic curve 21216i2

-4	8	-3
21216e2	42432z1	63648f2

---

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