Cremona's table of elliptic curves

2665 = 5 · 13 · 41

Field	Data	Notes
Atkin-Lehner	5+ 13+ 41-	Signs for the Atkin-Lehner involutions
Class	2665b	Isogeny class
Conductor	2665	Conductor
∏ cp	4	Product of Tamagawa factors cp
deg	7168	Modular degree for the optimal curve
Δ	4330625 = 54 · 132 · 41	Discriminant
Eigenvalues	-1  2 5+ -2  6 13+ -6  2	Hecke eigenvalues for primes up to 20
Equation	[1,1,1,-90221,10393018]	[a1,a2,a3,a4,a6]
j	81216996058270056529/4330625	j-invariant
L	1.3399256091534	L(r)(E,1)/r!
Ω	1.3399256091534	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	42640i1 23985k1 13325e1 34645g1	Quadratic twists by: -4 -3 5 13

Hecke Eigenvalues for elliptic curve 2665b1

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	6	+	-6	2	8	-6	-4	10	-	8	2	2	0	6	2	6	6	2	-16	-14	2

---

Quadratic twists for elliptic curve 2665b1

-4	-3	5	13	41
42640i1	23985k1	13325e1	34645g1	109265f1

---

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