Final answer:
To test whether a number is prime, check if any numbers between 2 and the square root of the number divide evenly into it. In the case of 177, it is not prime.
Step-by-step explanation:
A prime number is a number that is only divisible by 1 and itself. To test whether the number 177 is prime, we need to check if it has any divisors other than 1 and 177. We can do this by checking if any numbers between 2 and the square root of 177 divide evenly into it. In this case, 2 is the only number that evenly divides into 177, so 177 is not prime.