Elliptic curve isogeny class with Cremona label 72128cb (LMFDB label 72128.bz)

• Label: 72128cb
• Number of curves: $2$
• Conductor: $72128$
• CM: no
• Rank: $0$

Rank

The elliptic curves in class 72128cb have rank \(0\).

L-function data

Bad L-factors:

Prime	L-Factor
\(2\)	\(1\)
\(7\)	\(1\)
\(23\)	\(1 + T\)

Good L-factors:

Prime	L-Factor	Isogeny Class over \(\mathbb{F}_p\)
\(3\)	\( 1 - 2 T + 3 T^{2}\)	1.3.ac
\(5\)	\( 1 - 2 T + 5 T^{2}\)	1.5.ac
\(11\)	\( 1 + 11 T^{2}\)	1.11.a
\(13\)	\( 1 + 13 T^{2}\)	1.13.a
\(17\)	\( 1 - 2 T + 17 T^{2}\)	1.17.ac
\(19\)	\( 1 + 4 T + 19 T^{2}\)	1.19.e
\(29\)	\( 1 - 10 T + 29 T^{2}\)	1.29.ak
$\cdots$	$\cdots$	$\cdots$

See L-function page for more information

Complex multiplication

The elliptic curves in class 72128cb do not have complex multiplication.

Modular form 72128.2.a.cb

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.

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

Isogeny graph

The vertices are labelled with Cremona labels.

Elliptic curves in class 72128cb

LMFDB label	Cremona label	Weierstrass coefficients	j-invariant	Discriminant	Torsion structure	Modular degree	Faltings height	Optimality
72128.bz1	72128cb1	\([0, -1, 0, -177, 785]\)	\(109744/23\)	\(129253376\)	\([2]\)	\(24576\)	\(0.27127\)	\(\Gamma_0(N)\)-optimal
72128.bz2	72128cb2	\([0, -1, 0, 383, 4257]\)	\(275684/529\)	\(-11891310592\)	\([2]\)	\(49152\)	\(0.61785\)