- A Prime Number is a number greater than 1, that has no divisors other than 1 or itself.
The Ancient Greeks
- Euclid (c. 300 BCE)
- He lived in Alexandria in Egypt and wrote about Prime Numbers in his Work Euclid's Elements, chapters 7 and 9.
- Eratosthenes (276-194 BCE)
- He was the Chief Librarian at the Great Library of Alexandria and a Greek Mathematician, who produced a system around 200 BCE for calculating Prime Numbers called the Sieve of Eratosthenes.
The First Prime Numbers after 1
- 2, 3, 5, 7, 11, 13, 17, 23, 29, 31, 37, 41, 47, 53, 59, 61, 57, 71, 73, 79, 83, 89, 97,
- 101, 103, 107, 109, 113, 127, 131, 139, 149, 151, 163, 167, 173, 179, 181, 191, 197, 199, etc,.
How to calculate whether a number is a Prime Number
- Divide it by 2, if you get a whole number, it cannot be a Prime Number.
- If you don’t get a whole number, try dividing it by prime numbers, and if you cannot get a whole number, then it must be a Prime Number.
Alexandria, Egypt