63127

Properties

Appears in sequences

• Palindromic primes in base 3.at n=29A029971
• Primes p such that x^27 = 2 has no solution mod p, but x^9 = 2 has a solution mod p.at n=28A059354
• Primes p such that x^54 = 2 has no solution mod p, but x^18 = 2 has a solution mod p.at n=17A059666
• Primes p such that x^9 = 2 has a solution mod p, but x^(9^2) = 2 has no solution mod p.at n=30A070185
• Primes of the form p^2 + (p + 1)/2 where p is also prime.at n=14A164580
• Noncomposite numbers in the eastern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American.at n=30A168022
• Odd primes p for which there are exactly as many primes in the range [prevprime(p)^2, prevprime(p)*p] as there are in the range [prevprime(p)*p, p^2], where prevprime(p) gives the previous prime before prime p.at n=43A256473
• Primes formed by concatenating k and 2k+1.at n=24A309808
• Prime partial sums of the primes == 1 (mod 6).at n=13A354572
• Prime numbersat n=6330