1 and 2
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There is only 1 pair of factors for the number 11.The pair is 1 & 11.This means that 11 is a prime number. It is only evenly divisible by 1 and itself.
67 is a prime number, but 21 isn't. A prime number can only be evenly divided by '1' and itself. 21 can be evenly divided by 1, 3, 7, and 21.
A prime number is a number thats only factors are 1 and itself. So find the factors of 2. They are 1, and 2. So 2 is prime. A composite number is a number that has more than a pair of factors. So find the factors of 8. They are 1, and 8. They are 2, and 4. 8 has more than 1 pair of factors. So it is composite
I would describe it as the number ' 1 '.
It's a prime number so it only has one factor pair, 1•83