[tex]\bf 12a^3bd^5\qquad
\begin{cases}
12=2\cdot 2\cdot 3\\
a^3=a\cdot a\cdot a\\
d^5=d\cdot d\cdot d\cdot d\cdot d
\end{cases}\implies (2)(2)(3)aaabddddd[/tex]
is all I can see, I mean, you can't kill a dead horse, you can hit it, it won't make it deader, just flatter.