191021

Properties

Appears in sequences

• Primes p such that p, p+6, p+12, p+18 are consecutive primes and p=6*k+5 for some k.at n=29A090834
• n-th prime p such that (p+n)^2+n is prime but (p+j)^2+j is not prime for all 0<j<n.at n=33A238663
• Primes p such that if q is the next prime, the sum (with multiplicity) of prime factors of p^2 + q^2 is a square.at n=37A359443
• Prime numbersat n=17246