This number is a composite.
The first 93 digits of 93! form a prime number. [Vrba]
The exact number of 5-digit palindromic primes. [Patterson]
(93!/39!)+1 is prime. [Patterson]
The least positive
integer that produces exactly 93 primes in a Collatz
trajectory has never been found.
The 93 rightmost decimal digits of Graham's number form a prime. [Daniels]