101 is the smallest 3 digit prime number.
smallest 3-digit prime is 101. 100 is not a prime number (very obviously)
It is: 101
101
11 is the smallest two-digit prime number.
The smallest three digit prime number is 101.
103
101
The smallest two-digit prime number whose digits themselves are prime is 23. Both 2 and 3 are prime numbers, and together they form the prime number 23.
11 is the smallest 2 digit prime and 11^2=121
101 is the smallest 3 digit Prime number.
smallest staircase composite is the number 2222 because 1 is not counted as a prime so the 1 digit prime is 2, the smalles 2 digit prime is 11 and smallest 3 digit prime is 101. hope i helped =] P.S. you could have just checked it on the internet instead of asking. oh well XD