text: maths..shortest method to find prime numbers and check for it? please clearify that no-2 (two) is the only even prime number and help me to give some solid reasons can we use mathematical induction for this? all even numbers are divisable by 2 making all even numbers none prime.  2 is prime only because of the fact that the only whole number smaller than it is 1.  and using 1 in finding a prime number is part of it's defination that prime is only divisable by itself and 1.