In 2003, Bugeaud and Dujella [4] asked when there exists a set of m positive integers
such that one more than the product of any two of the integers is a kth power, with
k ≥ 3. Later, Bugeaud [3] considered the case in which the set is of the form {1, A, B},
with 1 < A < B. He noted that the desired property is equivalent to the existence of an
integer solution to the equation (xk−1)(yk−1) = (zk−1) (with appropriate restrictions),