118

This number is a composite.

If n is greater than or equal to 118, then the interval n to 4n/3 inclusive contains a prime number of each of the forms 4n + 1, 4n - 1, 6n + 1 and 6n - 1. [Wells]

118 is the smallest even number not differing by one or a prime number from one of its prime neighbors. [Wagler]

According to Rohrbach and Weis, p(n+1)-p(n)-1 < (1/13)p(n) for n > 118. [Post]

(118, 119) is the first pair of 3-digit successive composite numbers whose the reversals are both primes, i.e., (811, 911). [Loungrides]