We have the natural number system. The numbers start from 1 and extend up to infinity. Infinity is a very large number. Basically infinity is a number which cannot be counted or is uncountable. Natural numbers consist of all positive numbers. Negative numbers do not form part of this system. There are no decimals or fractions also in this system of numbers. We also do various operations on these set of numbers. Division is also one among them. When we divide one number by the other we get an answer. If the number is fully divisible by the other we get no remainder in that situation. There are two other categories of numbers among the set of natural numbers. The category is that of prime numbers and that of composite. This term denotes a natural number greater than ‘1’ that gets divided by only one and the same number itself.

It has only ‘1’ and the number itself as its factors. So, for simplicity

**what are all the prime numbers**up to 100 to start with. Some of them are 2, 3, 5, 7, 11, 13 and the list continues. This can also be represented in the form of a chart. The prime numbers up to 100 chart can be really helpful for the study. There are various numbers below ‘100’ which are prime in nature. The prime numbers below 100 are the numbers which are prime and are below 100. The total number of all the prime numbers up to 100 can be very useful. There are lots of these numbers and are easy to locate. They are also infinite in nature and are uncountable.

The

**prime numbers upto 100**are studied first for simplicity and only then larger numbers studied. When a number is divided by another number and no factors are got they fall into this set of numbers. They will be only divisible by the number ‘1’ and the original number itself. The other set of numbers which do not obey this rule fall into the category of composite numbers. Mostly the even numbers fall into this category. There is an exception to this. The number’2’ is the exception. It is even and also prime. All other even numbers form a part of composite numbers. This means that they have more than two factors. Mostly the odd numbers are prime in nature.

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