Nat.pow_of_pow_add_prime

∀ {a n : ℕ}, 1 < a → n ≠ 0 → Nat.Prime (a ^ n + 1) → ∃ m, n = 2 ^ m

Prime a ^ n + 1 implies n is a power of two (Fermat primes).

Defined in: Mathlib.NumberTheory.Fermat
Cited by: 0 results in Mathlib
Foundations: Depth 75 from the axioms · uses propext, Classical.choice, Quot.sound

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