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No square number is a prime number, since it has the number you squared as a factor. There are several square numbers less than 100. Just calculate the squares of all numbers, starting with 1, until you reach or pass 100. Then stop.
The sum of the all prime numbers from 1 to 100 is 1,161
The prime numbers from 100 to 110 are 101, 103, 107, and 109.
2 and 3 are the only consecutive numbers that are prime.
2 and 5 are the prime factors of 100.