86587

Properties

Appears in sequences

• Number of subsets of { 1, ..., n } containing an A.P. of length 10.at n=23A018795
• Primes p such that p,q,r,s are consecutive primes and 2p+9, 2q+9, 2r+9, 2s+9 are also primes.at n=20A190354
• Lexicographically largest increasing sequence of primes for which the continued square root map (see A257574) produces Pi.at n=45A257582
• Primes p such that 6p - 1 and 6p + 1 are twin primes and ((6p-1)^2 + (6p+1)^2) / 10 is prime.at n=44A283957
• Primes p such that q1=6*p-1 and q2=6*p+1 are also primes (twin primes) and q1 is a Sophie Germain prime (i.e., 2*q1+1 is prime).at n=42A358381
• Prime numbersat n=8420