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We study the classical flat full causal bulk viscous FRW cosmological modelthrough the factorization method. The method shows that there exists arelationship between the viscosity parameter $s$ and the parameter $\gamma$entering the equations of state of the model. Also, the factorization methodallows to find some new exact parametric solutions for different values of theviscous parameter $s$. Special attention is given to the well known case$s=1/2$, for which the cosmological model admits scaling symmetries.Furthermore, some exact parametric solutions for $s=1/2$ are obtained throughthe Lie group method.

Exact solutions of a Flat Full Causal Bulk viscous FRW cosmological model through factorization