216217

Properties

Appears in sequences

• Primes formed by concatenating n with n+1.at n=27A030458
• Primes whose decimal expansion is a concatenation of two or more consecutive increasing numbers (no leading zeros allowed).at n=28A052087
• Primes of the form prime(n)*prime(n+1) - 4.at n=20A092761
• Primes of the form prime(x)*prime(x+1) - (prime(x+1)-prime(x)).at n=15A140120
• Primes of the form 9n^2 - 8.at n=28A201961
• Number of (w,x,y,z) with all terms in {1,...,n} and w >= |x-y| + |y-z|.at n=27A212675
• Centered 21-gonal primes.at n=29A276261
• Primes formed by the concatenation of exactly two consecutive composite numbers.at n=12A342049
• Primes p such that 2p - 1, 3p - 2, (p + 1)/2, and (p + 2)/3 are also prime.at n=8A386540
• Prime numbersat n=19304