Makenna asked her teacher why 1 was not a prime number because it had only one rectangle like 3,4,7, and 11. Give Makenna a good reason why 1 is not considered a prime number, besides saying it is not prime by definition.
One reason why 1 is not considered a prime number is because prime numbers are defined as numbers that have exactly two distinct positive divisors: 1 and the number itself. However, 1 does not meet this criterion because it only has one positive divisor, which is 1.
Prime numbers are unique because they cannot be divided evenly by any other number apart from 1 and themselves. This property helps distinguish them from other numbers. By definition, 1 does not meet this unique criterion, which is why it is not considered a prime number.