3423373

Appears in sequences

• Riesel numbers n (n*2^k-1 is composite for all k>0, n odd) that have a covering set.at n=26A101036
• Odd integers n such that for every integer k>0, n*2^k-1 has a divisor in the set {3, 5, 7, 13, 17, 241}.at n=16A244070