140057

Properties

Appears in sequences

• Indices of prime Lucas numbers.at n=46A001606
• Numbers k such that floor(phi^k) is prime, where phi is the golden ratio.at n=46A059791
• Primes p such that floor(phi^p) is prime.at n=42A168033
• 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=22A216538
• Numbers n such that the n-th Lucas number is prime and can be written in the form a^2 + 3*b^2.at n=26A216554
• 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=37A216562
• 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=37A216565
• Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + b^2.at n=29A216566
• 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=34A216572
• 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=21A216575
• Primes whose base-7 representation also is the base-3 representation of a prime.at n=43A235470
• Prime numbersat n=13013