Prime numbers can be defined as numbers which have exactly two factors, one and itself. As a result, 1 is not considered as a prime number as it does not satisfy the condition. The first prime number, also the only even prime number is 2. It has exactly two factors, 1 and 2. Can you find out all the other Prime Numbers less than 100. Here are some websites that can help you to know more about Prime Numbers.
http://home-ed.info/maths/prime_numbers.html
http://www.icteachers.co.uk/children/sats/primes.htm
http://primes.utm.edu/
http://mathforum.org/isaac/problems/prime1.html
http://www.hbmeyer.de/eratclass.htm
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