Question

8
Find the greatest prime number that is required to test as a whether or not the following numbers
are prime:
197 and 227

Answer 1

Answer:

while finding divisors of any number you need the prime numbers till sqrt(of the given number). The prime number you need while factorization are [2,3,5,7,11,13] hence the largest prime number is 13.

Answer 2

Answer:

2 if we can divide the numbers with two with the reminder zero it is not a prime number

if the reminder doesn't give zero it is a prime number