C Program-Prime Number

Prime Number:      Write a c program to check given number is prime number or not.      Write a C program to print the prime number between 1to 1000.      Write a c program to find out prime factor of given number (Using While Loop).      Write a c program to find out prime factor of given number (With Recursion).      Write a c program to find out prime factor of given number (Without Recursion).      Write a c program to find Gold batch number (gold batch conjecture).      Write a c program to find Twin prime number up to a given number.