Cremona's table of elliptic curves

20800 = 2⁶ · 5² · 13

Field	Data	Notes
Atkin-Lehner	2+ 5- 13-	Signs for the Atkin-Lehner involutions
Class	20800bu	Isogeny class
Conductor	20800	Conductor
∏ cp	21	Product of Tamagawa factors cp
deg	24192	Modular degree for the optimal curve
Δ	2509940680000 = 26 · 54 · 137	Discriminant
Eigenvalues	2+  1 5-  2 -2 13- -2 -2	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,-9783,-367837]	[a1,a2,a3,a4,a6]
Generators	[-62:65:1]	Generators of the group modulo torsion
j	2588953638400/62748517	j-invariant
L	6.2280205445033	L(r)(E,1)/r!
Ω	0.48075003147525	Real period
R	0.61689524173515	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	1	Number of elements in the torsion subgroup
Twists	20800by1 10400ba1 20800j1	Quadratic twists by: -4 8 5

Hecke Eigenvalues for elliptic curve 20800bu1

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
+	1	-	2	-2	-	-2	-2	1	3	4	10	-2	-3	-6	-11	14	-11	10	0	2	-3	6	12	10

---

Quadratic twists for elliptic curve 20800bu1

-4	8	5
20800by1	10400ba1	20800j1

---

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