Cremona's table of elliptic curves

21648 = 2⁴ · 3 · 11 · 41

Field	Data	Notes
Atkin-Lehner	2- 3- 11+ 41+	Signs for the Atkin-Lehner involutions
Class	21648ba	Isogeny class
Conductor	21648	Conductor
∏ cp	40	Product of Tamagawa factors cp
deg	12800	Modular degree for the optimal curve
Δ	18404610048 = 212 · 35 · 11 · 412	Discriminant
Eigenvalues	2- 3-  2  0 11+  4 -6 -4	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,-672,1332]	[a1,a2,a3,a4,a6]
Generators	[-6:72:1]	Generators of the group modulo torsion
j	8205738913/4493313	j-invariant
L	7.2624779035326	L(r)(E,1)/r!
Ω	1.0659386229457	Real period
R	0.68132233387536	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	1353b1 86592ci1 64944bt1	Quadratic twists by: -4 8 -3

Hecke Eigenvalues for elliptic curve 21648ba1

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	+	4	-6	-4	-6	2	4	2	+	2	0	4	-2	6	-12	0	-6	-4	-16	8	-6

---

Quadratic twists for elliptic curve 21648ba1

-4	8	-3
1353b1	86592ci1	64944bt1

---

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