Invariants
| Level: | $248$ | $\SL_2$-level: | $8$ | ||||
| Index: | $12$ | $\PSL_2$-index: | $6$ | ||||
| Genus: | $0 = 1 + \frac{ 6 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 3 }{2}$ | ||||||
| Cusps: | $3$ (all of which are rational) | Cusp widths | $1^{2}\cdot4$ | Cusp orbits | $1^{3}$ | ||
| Elliptic points: | $0$ of order $2$ and $0$ of order $3$ | ||||||
| $\Q$-gonality: | $1$ | ||||||
| $\overline{\Q}$-gonality: | $1$ | ||||||
| Rational cusps: | $3$ | ||||||
| Rational CM points: | none |
Other labels
| Cummins and Pauli (CP) label: | 4B0 |
Level structure
| $\GL_2(\Z/248\Z)$-generators: | $\begin{bmatrix}28&1\\91&26\end{bmatrix}$, $\begin{bmatrix}73&102\\220&147\end{bmatrix}$, $\begin{bmatrix}142&153\\45&126\end{bmatrix}$, $\begin{bmatrix}153&134\\230&9\end{bmatrix}$, $\begin{bmatrix}221&122\\246&169\end{bmatrix}$ |
| Contains $-I$: | no $\quad$ (see 4.6.0.c.1 for the level structure with $-I$) |
| Cyclic 248-isogeny field degree: | $64$ |
| Cyclic 248-torsion field degree: | $7680$ |
| Full 248-torsion field degree: | $114278400$ |
Models
This modular curve is isomorphic to $\mathbb{P}^1$.
Rational points
This modular curve has infinitely many rational points, including 95098 stored non-cuspidal points.
Maps to other modular curves
$j$-invariant map of degree 6 to the modular curve $X(1)$ :
| $\displaystyle j$ | $=$ | $\displaystyle \frac{x^{6}(48x^{2}-y^{2})^{3}}{x^{10}(8x-y)(8x+y)}$ |
Modular covers
This modular curve is minimally covered by the modular curves in the database listed below.
| Covering curve | Level | Index | Degree | Genus |
|---|---|---|---|---|
| 248.24.0-4.b.1.4 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-4.d.1.2 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.d.1.4 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-124.g.1.5 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-124.h.1.5 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.k.1.4 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.m.1.3 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.m.1.4 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.n.1.1 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.n.1.2 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.o.1.1 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.o.1.2 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.p.1.3 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-8.p.1.4 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.s.1.6 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.v.1.6 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.y.1.2 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.y.1.6 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.z.1.3 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.z.1.7 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.ba.1.3 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.ba.1.7 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.bb.1.2 | $248$ | $2$ | $2$ | $0$ |
| 248.24.0-248.bb.1.6 | $248$ | $2$ | $2$ | $0$ |
| 248.384.14-124.c.1.1 | $248$ | $32$ | $32$ | $14$ |