divisible problem

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Find maximum n such that $2^n$ divides $2559^{2^{13}}​-2557^{2^{13}}​$

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By using Lifting the Exponent, we know that: $$n=v_2({2559}^{2^{13}}-{2557}^{2^{13}})=v_2(2559-2557)+v_2(2^{13})+v_2(2559+2557)-1\\=v_2(2)+13+v_2(5116)-1=1+13+2-1=15$$