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Prime and composite numbers


Prime numbers. Composite numbers. Infinite set of prime numbers.

All whole numbers (except 0 and 1) have minimum two factors: 1 and itself. Numbers, which arenít divisible by any numbers except 1 and itself, are called prime numbers. Numbers, which have also other factors, are called composite numbers. There is an infinite set of  prime numbers. The set of them till 200 is:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43,

47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101,

103, 107, 109, 113, 127, 131, 137, 139, 149, 151,

157, 163, 167, 173, 179, 181, 191, 193, 197, 199.

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