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Problem 1065

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  1. vf_a4620e53567e7c0c

    theoretical

    Erdős Problem #1065: declared status 'open'. Formalized: yes. Are there infinitely many primes pp such that p=2kq+1p=2^kq+1 for some prime qq and k≥0k\geq 0? Or p=2k3lq+1p=2^k3^lq+1? Prize: no. OEIS: A074781, A339465. Tags: number theory.

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