# General form???

If the perfect number $$496$$ is expressed in the form $$2^{k-1}(2^{k}-1)$$ and the perfect number $$8128$$ is expressed in the form $$2^{m-1}(2^{m}-1)$$.Find the value of $$k+m$$

Hint:Try putting small primes in place of $$k$$ and $$m$$.

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