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	1680r	Isogeny class
Conductor	1680	Conductor
∏ cp	4	Product of Tamagawa factors cp
deg	384	Modular degree for the optimal curve
Δ	6881280 = 216 · 3 · 5 · 7	Discriminant
Eigenvalues	2- 3- 5+ 7-  4 -2 -6  0	Hecke eigenvalues for primes up to 20
Equation	[0,1,0,-56,84]	[a1,a2,a3,a4,a6]
j	4826809/1680	j-invariant
L	2.1719552275872	L(r)(E,1)/r!
Ω	2.1719552275872	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	210d1 6720bv1 5040bo1 8400bk1	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 1680r1

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
-	-	+	-	4	-2	-6	0	8	10	8	2	-2	-8	-4	10	-4	-6	0	12	-6	8	4	14	2

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Quadratic twists for elliptic curve 1680r1

-4	8	-3	5	-7
210d1	6720bv1	5040bo1	8400bk1	11760bx1

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Data from Elliptic Curve Data by J. E. Cremona.
Design inspired by The Modular Forms Explorer by William Stein.

Part of Computational Number Theory
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