Characteristic polynomial
$$\begin{equation}\left(\lambda + 4\right)^{3} \left(\lambda^{2} - \lambda + 7\right)^{2} \left(\lambda^{9} + 5 \lambda^{8} - 33 \lambda^{7} - 562 \lambda^{6} - 2693 \lambda^{5} - 4408 \lambda^{4} - 4435 \lambda^{3} - 48693 \lambda^{2} - 139261 \lambda - 180260\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 4\right) \left(\lambda^{2} - \lambda + 7\right) \left(\lambda^{9} + 5 \lambda^{8} - 33 \lambda^{7} - 562 \lambda^{6} - 2693 \lambda^{5} - 4408 \lambda^{4} - 4435 \lambda^{3} - 48693 \lambda^{2} - 139261 \lambda - 180260\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 2 & 2 & 4 & 3 & 3 & 6 & 0 & 3 & 6 & 8 & 8 & 4 & 8 & 10 \\ 1 & -1 & 0 & 0 & 0 & 2 & 2 & 4 & 0 & 0 & 2 & 3 & 3 & 0 & 3 & 0 \\ 1 & 0 & -1 & 0 & 1 & 0 & 0 & 2 & 0 & 2 & 2 & 3 & 3 & 0 & 6 & 0 \\ 1 & 0 & 0 & -1 & 1 & 0 & 0 & 2 & 0 & 2 & 2 & 3 & 6 & 3 & 3 & 0 \\ 1 & 1 & 1 & 1 & -1 & 0 & 0 & -2 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 8 \\ 0 & 1 & 2 & -1 & -2 & -2 & -1 & 0 & -1 & -1 & 0 & 2 & 4 & 0 & 4 & 6 \\ 0 & 1 & 0 & 3 & 1 & 0 & -1 & 1 & 0 & 1 & 0 & 2 & 2 & 0 & 2 & 6 \\ 0 & 1 & 0 & 0 & 2 & 1 & 1 & -1 & 0 & 0 & 1 & 0 & 0 & 0 & 0 & 0 \\ 0 & 1 & -1 & -1 & 0 & 0 & 0 & 0 & 0 & 0 & -1 & 0 & 0 & 2 & 0 & -6 \\ 0 & 0 & 1 & 1 & 0 & 0 & 0 & 0 & 0 & -2 & 1 & 0 & 2 & 0 & 2 & 0 \\ 0 & 0 & 1 & 1 & 3 & 1 & 1 & 1 & 1 & 2 & -1 & 0 & -2 & 0 & -2 & 0 \\ 0 & 0 & 0 & 0 & 0 & 1 & 1 & -2 & -1 & 5 & 4 & -1 & 1 & 0 & 1 & 0 \\ 0 & 0 & 0 & 0 & 0 & 1 & -2 & 2 & -1 & 2 & 5 & 2 & 0 & 1 & 1 & -4 \\ 0 & 0 & 0 & 0 & 0 & 2 & 2 & 1 & 3 & -4 & -5 & -2 & -1 & -2 & -1 & 8 \\ 0 & 0 & 0 & 0 & 0 & 0 & 3 & 3 & 2 & -2 & -3 & 0 & 0 & 0 & -1 & 4 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & \frac{5}{2} & 3 & 1 & 3 & 0\end{pmatrix}\notag\end{equation}$$