Mersenne version of Brocard-Ramanujan equation

Abstract

In this study, we deal with a special form of the Brocard-Ramanujan equation, which is one of the interesting and still open problems of Diophantine analysis. We search for the positive integer solutions of the Brocard-Ramanujan equation for the case where the right-hand side is Mersenne numbers. By using the definition of Mersenne numbers, appropriate inequalities for the parameters of the equation, and the prime factorization of $n!$ we show that there is no positive integer solution to this equation. Thus, we obtain this interesting result demonstrating that the square of any Mersenne number can not be expressed as $n!+1$.

A New Version of Brocard-Ramanujan Equation

“…which later became known as the Brocard-Ramanujan Diophantine equation. The only known solutions of (1) are (4,5), (5,11) and (7,71). It is claimed in [4] that equation (1) cannot have solutions when n!…”

“…In this study, it was shown that there do not exist positive integers m and n that satisfy equation (2). For more versions of Brocard-Ramanujan Diophantine equation, see in [6,8,[10][11][12][13].…”