\[b_{1} = 2;\ \ b_{2} = 8;\ \ b_{3} = 32;\]
\[q = \frac{b_{2}}{b_{1}} = \frac{8}{2} = 4;\]
\[S_{5} = \frac{b_{1}\left( q^{n} - 1 \right)}{q - 1} = \frac{2 \cdot \left( 4^{5} - 1 \right)}{4 - 1} =\]
\[= \frac{2 \cdot (1024 - 1)}{3} = \frac{2 \cdot 1023}{3} =\]
\[= 2 \cdot 341 = 682.\]
\[Ответ:682.\]