Prime numbers:-A natural number which has exactly two factors(1 and itself) is called a prime number Ex:-2-factors(1,2),
3-factors(1,3),19-factors(1,19).
Note:-1.There are 15 prime numbers between 1 and 50.
2.There are 10 prime numbers between 50 and 100.
3.There are 25 prime numbers between 1 and 100.
4.There are 46 prime numbers between 1 and 200.
5.First prime number is 2.
6.Only 2 is an even prime number.
3-factors(1,3),19-factors(1,19).
Note:-1.There are 15 prime numbers between 1 and 50.
2.There are 10 prime numbers between 50 and 100.
3.There are 25 prime numbers between 1 and 100.
4.There are 46 prime numbers between 1 and 200.
5.First prime number is 2.
6.Only 2 is an even prime number.
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