99
73 is the largest two-digit number that is prime and has prime numbers for both of its digits.
99
987654
97
99
99
73 is the largest two-digit number that is prime and has prime numbers for both of its digits.
99
97
97
987654
97
97
It is 97.
99 is the largest two digit number. If I can use the digits anyway I want, then 9 to the 9th power is larger
9987654321