70249

Properties

Appears in sequences

• Primes with 23 as smallest positive primitive root.at n=21A061335
• Primes that do not divide any term of the Lucas 5-step sequence A074048.at n=20A106301
• a(n) is the n-th prime of the form x^2+n.at n=23A128968
• Smallest number k such that M(n)^2+k*M(n)-1 is prime with M(n)= Mersenne primes =A000668(n).at n=25A139426
• Smallest prime p such that M(n)^2+p*M(n)-1 is prime with M(n)= Mersenne primes =A000668(n).at n=25A139430
• Duplicate of A139426.at n=25A143384
• Duplicate of A139430.at n=25A143386
• Primes from merging of 5 successive digits in decimal expansion of sqrt(2).at n=14A198165
• Compound filter: a(n) = P(sigma(n), sigma(2n)), where P(n,k) is sequence A000027 used as a pairing function, and sigma is the sum of divisors (A000203).at n=47A286359
• Primes whose square is the sum of the cubes of four primes, not necessarily distinct.at n=13A353263
• Prime numbersat n=6964