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Let n 2 2 be a natural number. Show that if 2" 1 is a prime, then 71 must be a prime. Let n 2 2 be a natural number. Show that if 2'" + 1 is a...

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4. Let n 2 2 be a natural number. Show that if 2“ — 1 is a prime, then 71 must be a prime. 5. Let n 2 2 be a natural number. Show that if 2'” + 1 is a prime, then 71. must be a power
of 2.

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