| Curve name |
$X_{261}$ |
| Index |
$48$ |
| Level |
$8$ |
| Genus |
$1$ |
| Does the subgroup contain $-I$? |
Yes |
| Generating matrices |
$
\left[ \begin{matrix} 5 & 0 \\ 0 & 5 \end{matrix}\right],
\left[ \begin{matrix} 5 & 0 \\ 2 & 3 \end{matrix}\right],
\left[ \begin{matrix} 3 & 3 \\ 0 & 1 \end{matrix}\right]$ |
| Images in lower levels |
|
| Meaning/Special name |
|
| Chosen covering |
$X_{65}$ |
| Curves that $X_{261}$ minimally covers |
$X_{65}$, $X_{80}$, $X_{82}$, $X_{91}$, $X_{127}$, $X_{131}$, $X_{147}$ |
| Curves that minimally cover $X_{261}$ |
$X_{545}$ |
| Curves that minimally cover $X_{261}$ and have infinitely many rational
points. |
|
| Model |
A model was not computed. This curve is covered by $X_{54}$, which only has finitely many rational points. |
| Info about rational points |
| Comments on finding rational points |
None |
| Elliptic curve whose $2$-adic image is the subgroup |
None |
| Generic density of odd order reductions |
N/A |