Question 91
Find all natural numbers $a$ and $b$, for which the number $2^{a!} + 2^{b!}$ is a cube of a natural number.
*Recall that for a natural number $n$, $n! = 1 \cdot 2 \cdot 3 \cdot \ldots \cdot n$.*
(Arseniy Nicolaev)
*Recall that for a natural number $n$, $n! = 1 \cdot 2 \cdot 3 \cdot \ldots \cdot n$.*
(Arseniy Nicolaev)