26171

Properties

Appears in sequences

• Primes p such that p, p+6, p+12, p+18 are all primes.at n=39A023271
• Initial prime in set of 4 consecutive primes with common difference 6.at n=16A033451
• First term of balanced prime quartets: p(m+1)-p(m) = p(m+2)-p(m+1) = p(m+3)-p(m+2).at n=16A054800
• a(1)=1, a(n) is the smallest integer > a(n-1) such that the largest element in the simple continued fraction for S(n)=1/a(1)+1/a(2)+...+1/a(n) equals prime(n).at n=40A070901
• Primes p such that p, p+6, p+12, p+18 are consecutive primes and p=6*k+5 for some k.at n=9A090834
• Primes whose reversal - 1 is a square.at n=39A167218
• Erroneous version of A275148.at n=15A200948
• Primes p such that four consecutive primes starting with p are congruent to {1,2,3,4} (mod 5).at n=34A215607
• Primes p such that the quadratic form x^2+p*y^2 does not represent a prime strictly between p and 2p.at n=36A244029
• Numbers m where the least natural number k such that m + k^2 is prime reaches a new record value.at n=15A275148
• Primes to which a record size square needs to be added to reach another prime.at n=13A309179
• Lesser of sexy happy primes.at n=34A387258
• Prime numbersat n=2876