631181

Properties

Appears in sequences

• Indices of prime Lucas numbers.at n=58A001606
• Numbers k such that 2*P(k) + 5, 2*P(k+1) + 7, 2*P(k+2) + 9, 2*P(k+3) + 11 are also consecutive primes where P(i) = i-th prime.at n=6A103875
• Primes p such that floor(phi^p) is prime.at n=54A168033
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 7*b^2.at n=28A216538
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 3*b^2.at n=22A216555
• Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 2*b^2.at n=48A216562
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 5*b^2.at n=46A216565
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + b^2.at n=37A216566
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 6*b^2.at n=41A216572
• Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 10*b^2.at n=29A216575
• Prime numbersat n=51420