1106681

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=5A101036
• Odd integers n such that for every integer k>0, n*2^k-1 has a divisor in the set {3, 5, 7, 13, 19, 37, 73}.at n=2A244071
• Odd numbers n not congruent to 1 mod 6 and that are not perfect powers such that for all k >= 1 the numbers n*4^k - 1 are composite.at n=7A251757