n!+3 equaling a power of 3
Source: IrMO 2022
May 8, 2022
number theoryfactorial
Problem Statement
1. For n a positive integer, n! = 1 2 3 (n - 1) n is the product of the positive integers from 1 to n.Determine, with proof, all positive integers n for which n! + 3 is a power of 3.