"The list of prime numbers upto number 1000 is [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, ...

ap.test_prime(n)- This is an efficient prime number tester program created to check if the given number is a prime number or not. ap.prev_prime(n)- used to give the just previous prime number value ...