The modular curve $X_{116b}$

Curve name $X_{116b}$
Index $48$
Level $32$
Genus $0$
Does the subgroup contain $-I$? No
Generating matrices $ \left[ \begin{matrix} 3 & 9 \\ 4 & 1 \end{matrix}\right], \left[ \begin{matrix} 1 & 0 \\ 0 & 5 \end{matrix}\right], \left[ \begin{matrix} 1 & 3 \\ 20 & 5 \end{matrix}\right], \left[ \begin{matrix} 3 & 21 \\ 28 & 7 \end{matrix}\right]$
Images in lower levels
LevelIndex of imageCorresponding curve
$2$ $3$ $X_{6}$
$4$ $6$ $X_{13}$
$8$ $12$ $X_{32}$
$16$ $24$ $X_{116}$
Meaning/Special name
Chosen covering $X_{116}$
Curves that $X_{116b}$ minimally covers
Curves that minimally cover $X_{116b}$
Curves that minimally cover $X_{116b}$ and have infinitely many rational points.
Model $\mathbb{P}^{1}$, a universal elliptic curve over an appropriate base is given by \[y^2 = x^3 + A(t)x + B(t), \text{ where}\] \[A(t) = -27t^{18} - 1296t^{14} - 21168t^{10} - 124416t^{6} - 110592t^{2}\] \[B(t) = 54t^{27} + 3888t^{23} + 110160t^{19} + 1524096t^{15} + 10119168t^{11} + 23887872t^{7} - 14155776t^{3}\]
Info about rational points
Comments on finding rational points None
Elliptic curve whose $2$-adic image is the subgroup $y^2 + xy = x^3 - x^2 - 13889448x - 19920207749$, with conductor $84681$
Generic density of odd order reductions $9249/57344$

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