TURKISH JOURNAL OF MATHEMATICS, cilt.42, sa.5, ss.2690-2698, 2018 (SCI-Expanded)
Suppose that c, in, and a are positive integers with a 11, 13 (mod 24) . In this work, we prove that when 2c + 1 = a(2), the Diophantine equation in the title has only solution (x, y, z) = (1,1,2) where m +/- 1 (mod a) and m > a(2) in positive integers. The main tools of the proofs are elementary methods and Baker's theory.