Cremona's table of elliptic curves

20440 = 2³ · 5 · 7 · 73

Field	Data	Notes
Atkin-Lehner	2+ 5- 7- 73+	Signs for the Atkin-Lehner involutions
Class	20440d	Isogeny class
Conductor	20440	Conductor
∏ cp	2	Product of Tamagawa factors cp
deg	1632	Modular degree for the optimal curve
Δ	-40880 = -1 · 24 · 5 · 7 · 73	Discriminant
Eigenvalues	2+ -1 5- 7- -6  6  0  2	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-15,-20]	[a1,a2,a3,a4,a6]
Generators	[7:13:1]	Generators of the group modulo torsion
j	-24918016/2555	j-invariant
L	4.4303602961582	L(r)(E,1)/r!
Ω	1.1993523651577	Real period
R	1.8469802640425	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	40880f1 102200p1	Quadratic twists by: -4 5

Hecke Eigenvalues for elliptic curve 20440d1

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	-	-	-6	6	0	2	0	6	5	-8	-10	5	-4	-5	-3	-2	-8	-9	+	-5	8	-6	14

---

Quadratic twists for elliptic curve 20440d1

-4	5
40880f1	102200p1

---

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