52489

Properties

Appears in sequences

• Class 1- (or Pierpont) primes: primes of the form 2^t*3^u + 1.at n=30A005109
• a(n) = n*3^n + 1.at n=8A050914
• Prime factors of numbers in A006521 (numbers k that divide 2^k + 1).at n=9A057719
• Primes of form 1+(2^a)*(3^b), a>0, b>0.at n=25A058383
• Smallest prime factor of n^n-(n-1)^(n-1).at n=13A068954
• Primes of the form n^2*totient(n)+1 (or A053191(n) + 1).at n=17A076669
• Primes obtained as the product of successive terms of A084039 + 1, i.e., a(n) = A084039(n)*A084039(n+1) + 1.at n=20A084040
• Primes of the form 8*k^2 + 1.at n=11A090685
• Primes of the form 2*n^2+1.at n=26A090698
• Numbers n such that sigma(n) = 2n - 3*phi(phi(n)).at n=26A110074
• Primes that divide 2^(3^n)+1 for some n.at n=5A136474
• Least prime p of the form c*3^n+1 with c not divisible by 3.at n=8A137990
• Primes which are divisors of numbers of the form (2^phi(3^k) - 1)/3^k.at n=9A152008
• a(n) = 72*n^2 + 1.at n=27A158740
• Triangle read by rows in which row n lists n terms, starting with n, such that the difference between successive terms is equal to n^4 - 1 = A123865(n).at n=44A162623
• Prime numbers of the form n*b^n + 1, where b, n >= 2.at n=31A178541
• Primes of the form n*3^n + 1.at n=1A182374
• a(n) = 8*3^n + 1.at n=8A199111
• a(n) = 8*9^n+1.at n=4A199677
• Primes of the form 9*n^3 + 1.at n=4A201263