27809

Properties

Appears in sequences

• Primes that are palindromic in base 11.at n=33A029978
• Prime numbers p such that 2*p+1, p*(p + 1) - 1 and p*(p + 1) + 1 are also primes.at n=17A136015
• Sophie Germain primes in A154939.at n=24A154941
• Numbers n such that n^1+n+1, n^2+n+1, n^3+n+1 and n^4+n+1 are all prime.at n=19A219117
• Primes p such that p^1+p+1, p^2+p+1, p^3+p+1, and p^4+p+1 are all prime.at n=5A236045
• Primes p such that p^4 + p +/- 1 are twin primes.at n=13A236951
• Primes p with pi(p) and pi(p^2) both prime, where pi(.) is given by A000720.at n=32A237659
• Primes p such that q = p^2 - 2, r = q^2 - 2 and s = r^2 - 2 are also prime.at n=8A257552
• Number of Grassmannian permutations of size n that avoid a pattern, sigma, where sigma is a pattern of size 10 with exactly one descent.at n=15A362197
• Primes such that x^16 = 2 has a solution in Z/pZ, but x^32 = 2 does not.at n=12A373468
• Numerators of the partial sums of the reciprocals of the 3rd Piltz function d_3(n) (A007425).at n=37A379357
• Prime numbersat n=3037