322523

Properties

Appears in sequences

• (Provable) Sierpiński numbers: odd numbers n such that for all k >= 1 the numbers n*2^k + 1 are composite.at n=3A076336
• Prime values of n for which n*2^k + 1 is composite for all positive integers k.at n=1A137715
• Odd integers n such that for every integer k>0, n*2^k+1 has a divisor in the set { 3, 5, 7, 13, 37, 73, 109 }.at n=0A244565
• Prime numbersat n=27810