## The modular curve $X_{240n}$

Curve name $X_{240n}$
Index $96$
Level $32$
Genus $0$
Does the subgroup contain $-I$? No
Generating matrices $\left[ \begin{matrix} 7 & 7 \\ 0 & 7 \end{matrix}\right], \left[ \begin{matrix} 3 & 0 \\ 0 & 7 \end{matrix}\right], \left[ \begin{matrix} 5 & 0 \\ 0 & 3 \end{matrix}\right], \left[ \begin{matrix} 7 & 0 \\ 16 & 1 \end{matrix}\right]$
Images in lower levels
 Level Index of image Corresponding curve $2$ $3$ $X_{6}$ $4$ $6$ $X_{13}$ $8$ $24$ $X_{36q}$ $16$ $48$ $X_{118s}$
Meaning/Special name
Chosen covering $X_{240}$
Curves that $X_{240n}$ minimally covers
Curves that minimally cover $X_{240n}$
Curves that minimally cover $X_{240n}$ and have infinitely many rational points.
Model $\mathbb{P}^{1}$, a universal elliptic curve over an appropriate base is given by $y^2 = x^3 + A(t)x + B(t), \text{ where}$ $A(t) = -108t^{24} + 864t^{20} - 13824t^{12} + 25920t^{8} + 13824t^{4} - 27648$ $B(t) = 432t^{36} - 5184t^{32} + 10368t^{28} + 96768t^{24} - 445824t^{20} + 41472t^{16} + 2515968t^{12} - 3649536t^{8} + 1327104t^{4} - 1769472$
Elliptic curve whose $2$-adic image is the subgroup $y^2 = x^3 - 12x - 2576$, with conductor $2880$
Generic density of odd order reductions $73/672$