A machine component supports the stresses shown in the diagram. $\sigma_x = 60$ $MPa$, $\sigma_y = 39$ $MPa$, $\sigma_z = 179$ $MPa$ and $\tau_{xy} = 49$ $MPa$. The component is made of steel whose yield stress $\sigma_Y = 296$ $MPa$. The steel yields according to the Mises criterion. Calculate the safety factor $SF$.

$SF=$