Cremona's table of elliptic curves

20720 = 2⁴ · 5 · 7 · 37

Field	Data	Notes
Atkin-Lehner	2+ 5+ 7- 37-	Signs for the Atkin-Lehner involutions
Class	20720c	Isogeny class
Conductor	20720	Conductor
∏ cp	22	Product of Tamagawa factors cp
deg	112640	Modular degree for the optimal curve
Δ	-3464909198293760 = -1 · 28 · 5 · 711 · 372	Discriminant
Eigenvalues	2+ -1 5+ 7- -3 -7  7  0	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,1959,2831221]	[a1,a2,a3,a4,a6]
Generators	[540:12691:1]	Generators of the group modulo torsion
j	3246125782016/13534801555835	j-invariant
L	3.1235297965329	L(r)(E,1)/r!
Ω	0.35010445784087	Real period
R	0.40553218885223	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	10360b1 82880bq1 103600a1	Quadratic twists by: -4 8 5

Hecke Eigenvalues for elliptic curve 20720c1

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	+	-	-3	-7	7	0	-4	-7	4	-	4	-4	7	-6	10	8	2	-16	14	5	0	12	-1

---

Quadratic twists for elliptic curve 20720c1

-4	8	5
10360b1	82880bq1	103600a1

---

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