There is no three digit Prime number whose square root is a prime number. Prime numbers have no factors other than 1 and themselves. Any number having a prime number as a square root is a composite number.
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
9797 is the largest two digit prime number.
The answer is 961. The square root of 961 is 31, which is a prime number.
The largest 5-digit prime number is 99,991
97 is the largest 2-digit prime number.
The largest single digit prime number is 7.
The largest five-digit prime number is 99,991.
The largest four-digit prime number is 9973.
997 is the largest 3-digit prime.