23
$3000 for the next prime, $50,000 for the next Mersenne prime, $150,000 for a 100 million digit prime.
9797 is the largest two digit prime number.
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
The largest single digit composite number is 9. The largest prime number is 17 million digits long. The definition of a composite number is any number that has at least one positive divisor other than one or the number itself (it is not a prime number). The largest composite digit is therefore longer than the largest prime number by at leaf +1.
The first 'three digit' Prime Number is 101.
11 is the smallest two-digit prime number.
997 is the biggest 3 digit prime number.
The first two-digit prime number is 11.
997 is the last 3 digit prime number
The largest two-digit prime number is 97.
The largest single digit prime number is 7.