$$4^{9}+2\times4^{9-1}=3$$
$\text{false}$
$$262144+2\times 4^{9-1}=3$$
$$262144+2\times 4^{8}=3$$
$$262144+2\times 65536=3$$
$$262144+131072=3$$
$$393216=3$$
$$\text{false}$$
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