Cremona's table of elliptic curves

1680 = 2⁴ · 3 · 5 · 7

Field	Data	Notes
Atkin-Lehner	2+ 3+ 5+ 7+	Signs for the Atkin-Lehner involutions
Class	1680a	Isogeny class
Conductor	1680	Conductor
∏ cp	32	Product of Tamagawa factors cp
Δ	11289600 = 210 · 32 · 52 · 72	Discriminant
Eigenvalues	2+ 3+ 5+ 7+  0  2  2 -4	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-56,0]	[a1,a2,a3,a4,a6]
Generators	[-4:12:1]	Generators of the group modulo torsion
j	19307236/11025	j-invariant
L	2.3423776590419	L(r)(E,1)/r!
Ω	1.8867310441882	Real period
R	0.62075028294501	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	4	Number of elements in the torsion subgroup
Twists	840i2 6720cf2 5040n2 8400y2	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 1680a2

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	2	2	-4	0	2	-4	2	-2	-8	4	-2	-12	-14	-8	8	-2	-8	4	-18	-2

---

Quadratic twists for elliptic curve 1680a2

-4	8	-3	5	-7
840i2	6720cf2	5040n2	8400y2	11760bd2

---

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