Characteristic polynomial
$$\begin{equation}\left(\lambda + 3\right)^{3} \left(\lambda - 1\right)^{2} \left(\lambda^{11} + 14 \lambda^{10} + 24 \lambda^{9} - 1549 \lambda^{8} - 19791 \lambda^{7} - 103459 \lambda^{6} - 87040 \lambda^{5} + 1875524 \lambda^{4} + 8920800 \lambda^{3} + 4016580 \lambda^{2} - 54538304 \lambda - 89842967\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 3\right)^{2} \left(\lambda - 1\right) \left(\lambda^{11} + 14 \lambda^{10} + 24 \lambda^{9} - 1549 \lambda^{8} - 19791 \lambda^{7} - 103459 \lambda^{6} - 87040 \lambda^{5} + 1875524 \lambda^{4} + 8920800 \lambda^{3} + 4016580 \lambda^{2} - 54538304 \lambda - 89842967\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 2 & 4 & 6 & 0 & 12 & 12 & 6 & 18 & 12 & 16 & 24 & 8 & 16 & 10 \\ 1 & -1 & 0 & 0 & 0 & 2 & 4 & 6 & 0 & 6 & 6 & 6 & 12 & 6 & 9 & 8 \\ 1 & 0 & -1 & 0 & 1 & 0 & 0 & 0 & 4 & 4 & 0 & 12 & 12 & 0 & 12 & 8 \\ 1 & 2 & 0 & -2 & 1 & 0 & -8 & 0 & 2 & 6 & 0 & 0 & 12 & 30 & 6 & 16 \\ 1 & 0 & 1 & 2 & -1 & 0 & 8 & 0 & 0 & 0 & 4 & 0 & 0 & -18 & 0 & 0 \\ 0 & 1 & 1 & 0 & 0 & -2 & 0 & 1 & 0 & 0 & 0 & 4 & 4 & 0 & 6 & 6 \\ 0 & 1 & 0 & 1 & 0 & 0 & -3 & 1 & 0 & 0 & -3 & 2 & 6 & 4 & 0 & 6 \\ 0 & 1 & 0 & 0 & 1 & 1 & 2 & -2 & 0 & 0 & 3 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 2 & 1 & 1 & 2 & 0 & 0 & -1 & 1 & 0 & 0 & 0 & 0 & 4 & 12 \\ 0 & 0 & 0 & 1 & 2 & 0 & 0 & 2 & 1 & -1 & 2 & 0 & 0 & 8 & 0 & 0 \\ 0 & 0 & 0 & 1 & 0 & 0 & 2 & 0 & 0 & 1 & -2 & 0 & 0 & -8 & 2 & 0 \\ 0 & 0 & 0 & 0 & 0 & 2 & 1 & 1 & 1 & -1 & -\frac{1}{2} & -2 & 0 & 0 & -\frac{1}{2} & 4 \\ 0 & 0 & 0 & 0 & 0 & 0 & 1 & 2 & 0 & 2 & \frac{1}{2} & 1 & -1 & 2 & \frac{1}{2} & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 1 & 0 & 0 & 0 & \frac{3}{2} & 0 & 1 & -2 & 0 & 2 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 3 & 2 & 2 & 2 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 3 & 2 & 2 & 0\end{pmatrix}\notag\end{equation}$$