Cremona's table of elliptic curves

21021 = 3 · 7² · 11 · 13

Field	Data	Notes
Atkin-Lehner	3- 7- 11+ 13-	Signs for the Atkin-Lehner involutions
Class	21021h	Isogeny class
Conductor	21021	Conductor
∏ cp	400	Product of Tamagawa factors cp
deg	345600	Modular degree for the optimal curve
Δ	-2184746031524026971 = -1 · 310 · 77 · 112 · 135	Discriminant
Eigenvalues	0 3- -3 7- 11+ 13- -4 -7	Hecke eigenvalues for primes up to 20
Equation	[0,1,1,323433,6805397]	[a1,a2,a3,a4,a6]
Generators	[4293:283783:1] [3:2788:1]	Generators of the group modulo torsion
j	31804393380282368/18570034862379	j-invariant
L	6.4772446308342	L(r)(E,1)/r!
Ω	0.15733114392938	Real period
R	0.10292375160226	Regulator
r	2	Rank of the group of rational points
S	0.99999999999994	(Analytic) order of Ш
t	1	Number of elements in the torsion subgroup
Twists	63063ba1 3003c1	Quadratic twists by: -3 -7

Hecke Eigenvalues for elliptic curve 21021h1

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	-	-3	-	+	-	-4	-7	-7	-1	-5	-4	-6	-7	-5	9	4	0	10	-6	3	-15	-7	3	-19

---

Quadratic twists for elliptic curve 21021h1

-3	-7
63063ba1	3003c1

---

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