199211

Properties

Appears in sequences

• Juxtapose pairs of primes (starting at 1).at n=23A007794
• Primes that are concatenations of two consecutive primes.at n=6A030461
• Primes which are a concatenation of at least two consecutive primes.at n=10A068655
• Consecutive prime pairs which after concatenation are prime (ascending or descending order).at n=12A133986
• Primes that are a concatenation of consecutive primes in two ways.at n=0A154531
• Number of isomorphism classes of nanocones with 5 pentagons and a symmetric boundary of length n.at n=21A198086
• Terms of A030461 that give successive gap records.at n=2A267692
• a(n) is the least term of A030461 with gap = 6*n between consecutive primes or 0 if no such term exists.at n=1A267721
• Primes formed from the concatenation of previousprime(n) and n.at n=18A280576
• 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=39A359443
• Prime numbersat n=17921