Composite and Prime Numbers

By Dalia Javiel

A number that can be divided without remainder by at least one positive

number other than itself and 1.

Composite Number

Any number that is not prime or 1: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99 and 100 itself.

9 can be divided evenly by 1, 3, and 9.

So 9 is a composite number because it can also be divided by 3

evenly.

Composite number example

A number that has two divisors: 1 and itself.

Prime Number

Prime numbers in white boxes.

The History of the Prime Number

According to Euclid, there is an infinite number of Primes.

Euclid of Alexandria

Birth: 300 B.C.

Death: Unknown

Residence: Alexandria, Egypt

Field: Mathematics

Known for: Euclidian Geometry

Father of GeometryEuclid

Many types of prime factorization

6=2x3Divided into two groups:

Composite Example

7 cannot be divided evenly:

Prime Number Example