The first 'three digit' Prime Number is 101.
The smallest three digit prime number is 101.
997 is the last 3 digit prime number
There are 17 such numbers.
smallest 3-digit prime is 101. 100 is not a prime number (very obviously)
101 is the first three-digit prime number.
The largest three digit prime number whose digits are all primes is 773.
9 isn't prime, but one three-digit multiple of 18 is 108.
No prime number can be divided by 4 exactly.