139483

Properties

Appears in sequences

• Prime factors of numbers in A006521 (numbers k that divide 2^k + 1).at n=13A057719
• Number of column convex polyominoes with n hexagonal cells.at n=9A059716
• Primes that divide 2^(3^n)+1 for some n.at n=8A136474
• Irregular triangle read by rows: row n gives prime factors of (2^(3^(n+1))+1)/(2^(3^n)+1).at n=11A136475
• Primes which are divisors of numbers of the form (2^phi(3^k) - 1)/3^k.at n=15A152008
• Primes p such that x^41 = 2 has a solution mod p, and p is congruent to 1 mod 41.at n=5A190758
• Prime numbersat n=12965