I'm trying to solve some problem, but I don't have any good idea to do it Prove that a^{2}+b^{3}+c^{6}, where a,b,c are positive integers, is always composite number. Thanks for all help
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Originally Posted by aleschio Prove that a^{2}+b^{3}+c^{6}, where a,b,c are positive integers, is always composite number. Thanks for all help But it is not true: let $\displaystyle a=2,~b=2,~\&~c=1$.
And what if a,b and c is different from 1?
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