199513

Appears in sequences

• Odd numbers m such that for all 2^k < m the numbers m + 2^k, m - 2^k, m*2^k + 1, and m*2^k - 1 are composite, with k >= 1.at n=25A256163
• Numbers k such that 431*2^k+1 is prime.at n=34A323031