47783

Appears in sequences

• Strong pseudoprimes to base 23.at n=22A020249
• Numbers k such that 111*2^k+1 is prime.at n=16A032405
• a(1) = 1, a(2) = 2; then a(n) = smallest number such that there are a(n-1) composite numbers between a(n) and a(n+1) exclusive.at n=19A082281