Cremona's table of elliptic curves

2691 = 3² · 13 · 23

Field	Data	Notes
Atkin-Lehner	3- 13- 23+	Signs for the Atkin-Lehner involutions
Class	2691c	Isogeny class
Conductor	2691	Conductor
∏ cp	4	Product of Tamagawa factors cp
deg	384	Modular degree for the optimal curve
Δ	653913 = 37 · 13 · 23	Discriminant
Eigenvalues	1 3-  2  0  0 13- -6 -4	Hecke eigenvalues for primes up to 20
Equation	[1,-1,0,-171,904]	[a1,a2,a3,a4,a6]
Generators	[20:62:1]	Generators of the group modulo torsion
j	761048497/897	j-invariant
L	4.2815017177137	L(r)(E,1)/r!
Ω	2.8676344245023	Real period
R	1.4930430745044	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	43056bv1 897c1 67275m1 34983c1	Quadratic twists by: -4 -3 5 13

Hecke Eigenvalues for elliptic curve 2691c1

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	0	0	-	-6	-4	+	-6	0	2	6	-8	8	-2	-12	-10	-4	16	2	-4	0	6	-10

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Quadratic twists for elliptic curve 2691c1

-4	-3	5	13	-23
43056bv1	897c1	67275m1	34983c1	61893i1

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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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