Elliptic curve isogeny class with LMFDB label 81312.bm (Cremona label 81312r)

• Label: 81312.bm
• Number of curves: $2$
• Conductor: $81312$
• CM: no
• Rank: $1$

Rank

The elliptic curves in class 81312.bm have rank \(1\).

L-function data

Bad L-factors:

Prime	L-Factor
\(2\)	\(1\)
\(3\)	\(1 - T\)
\(7\)	\(1 + T\)
\(11\)	\(1\)

Good L-factors:

Prime	L-Factor	Isogeny Class over \(\mathbb{F}_p\)
\(5\)	\( 1 + 5 T^{2}\)	1.5.a
\(13\)	\( 1 - 2 T + 13 T^{2}\)	1.13.ac
\(17\)	\( 1 + 4 T + 17 T^{2}\)	1.17.e
\(19\)	\( 1 - 6 T + 19 T^{2}\)	1.19.ag
\(23\)	\( 1 + 4 T + 23 T^{2}\)	1.23.e
\(29\)	\( 1 - 2 T + 29 T^{2}\)	1.29.ac
$\cdots$	$\cdots$	$\cdots$

See L-function page for more information

Complex multiplication

The elliptic curves in class 81312.bm do not have complex multiplication.

Modular form 81312.2.a.bm

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.

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

Isogeny graph

The vertices are labelled with LMFDB labels.

Elliptic curves in class 81312.bm

LMFDB label	Cremona label	Weierstrass coefficients	j-invariant	Discriminant	Torsion structure	Modular degree	Faltings height	Optimality
81312.bm1	81312r2	\([0, 1, 0, -197777928, -1060715168856]\)	\(943259332190261813000/10069472554261659\)	\(9133406652262573506405888\)	\([2]\)	\(19353600\)	\(3.6053\)
81312.bm2	81312r1	\([0, 1, 0, -2906218, -41302279504]\)	\(-23942656868248000/6485575209206247\)	\(-735333894604584201060288\)	\([2]\)	\(9676800\)	\(3.2588\)	\(\Gamma_0(N)\)-optimal