Elliptic curve isogeny class with Cremona label 208d (LMFDB label 208.d)

• Label: 208d
• Number of curves: $2$
• Conductor: $208$
• CM: no
• Rank: $0$

Rank

The elliptic curves in class 208d have rank \(0\).

L-function data

Bad L-factors:

Prime	L-Factor
\(2\)	\(1\)
\(13\)	\(1 + T\)

Good L-factors:

Prime	L-Factor	Isogeny Class over \(\mathbb{F}_p\)
\(3\)	\( 1 - 3 T + 3 T^{2}\)	1.3.ad
\(5\)	\( 1 + T + 5 T^{2}\)	1.5.b
\(7\)	\( 1 + T + 7 T^{2}\)	1.7.b
\(11\)	\( 1 - 2 T + 11 T^{2}\)	1.11.ac
\(17\)	\( 1 + 3 T + 17 T^{2}\)	1.17.d
\(19\)	\( 1 + 6 T + 19 T^{2}\)	1.19.g
\(23\)	\( 1 - 4 T + 23 T^{2}\)	1.23.ae
\(29\)	\( 1 - 2 T + 29 T^{2}\)	1.29.ac
$\cdots$	$\cdots$	$\cdots$

See L-function page for more information

Complex multiplication

The elliptic curves in class 208d do not have complex multiplication.

Modular form 208.2.a.d

Isogeny matrix

The \(i,j\) entry is the smallest degree of a cyclic isogeny between the \(i\)-th and \(j\)-th curve in the isogeny class, in the Cremona numbering.

\(\left(\begin{array}{rr} 1 & 7 \\ 7 & 1 \end{array}\right)\)

Isogeny graph

The vertices are labelled with Cremona labels.

Elliptic curves in class 208d

LMFDB label	Cremona label	Weierstrass coefficients	j-invariant	Discriminant	Torsion structure	Modular degree	Faltings height	Optimality
208.d2	208d1	\([0, 0, 0, -43, -166]\)	\(-2146689/1664\)	\(-6815744\)	\([]\)	\(48\)	\(0.0099866\)	\(\Gamma_0(N)\)-optimal
208.d1	208d2	\([0, 0, 0, -3403, 83834]\)	\(-1064019559329/125497034\)	\(-514035851264\)	\([]\)	\(336\)	\(0.98294\)