Can anyone please help me on the following proof:
Prove that there exist infinitely many positive integers $n$ such that $2^n$ ends with $n$ in decimal notation, i.e. $2n = \ldots n$.
Can anyone please help me on the following proof:
Prove that there exist infinitely many positive integers $n$ such that $2^n$ ends with $n$ in decimal notation, i.e. $2n = \ldots n$.