Beal conjecture is a famous world
mathematical problem and was proposed by American banker Beal, so to solve it is more
difficult than Fermat’s last theorem. This paper uses relationship between the mathematical formula and
corresponding graph, and by characteristics of graph, combined with the algebraic
transformation and congruence theory of number theory; it is proved that the equation can only be formed under having a common
factor and Beal conjecture is correct.
