Elliptic curve isogeny class with LMFDB label 680.b (Cremona label 680a)

• Label: 680.b
• Number of curves: $4$
• Conductor: $680$
• CM: no
• Rank: $1$

Elliptic curves in class 680.b

LMFDB label	Cremona label	Weierstrass coefficients	j-invariant	Discriminant	Torsion structure	Modular degree	Faltings height	Optimality
680.b1	680a3	\([0, 0, 0, -1163, -14938]\)	\(84944038338/2088025\)	\(4276275200\)	\([2]\)	\(256\)	\(0.63186\)
680.b2	680a2	\([0, 0, 0, -163, 462]\)	\(467720676/180625\)	\(184960000\)	\([2, 2]\)	\(128\)	\(0.28529\)
680.b3	680a1	\([0, 0, 0, -143, 658]\)	\(1263257424/425\)	\(108800\)	\([4]\)	\(64\)	\(-0.061283\)	\(\Gamma_0(N)\)-optimal
680.b4	680a4	\([0, 0, 0, 517, 3318]\)	\(7462174302/6640625\)	\(-13600000000\)	\([2]\)	\(256\)	\(0.63186\)

Rank

The elliptic curves in class 680.b have rank \(1\).

Complex multiplication

The elliptic curves in class 680.b do not have complex multiplication.

Modular form 680.2.a.b

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 LMFDB numbering.

\(\left(\begin{array}{rrrr} 1 & 2 & 4 & 4 \\ 2 & 1 & 2 & 2 \\ 4 & 2 & 1 & 4 \\ 4 & 2 & 4 & 1 \end{array}\right)\)

Isogeny graph

The vertices are labelled with LMFDB labels.