# Prime Numbers

### Divisible by 1 and by itself.

A prime number (or a prime) is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways of writing it as a product, 1 x 5 or 5 x 1, involve 5 itself. However, 6 is composite because it is the product of two numbers (2 x 3) that are both smaller than 6. Primes are central in number theory because of the fundamental theorem of arithmetic: every natural number greater than 1 is either a prime itself or can be factorized as a product of primes that is unique up to their order.
Wikipedia, Prime Number, 2020

Primes are 2, 3, 5, 7... However this was portrayed in the Quran 1400 years ago. In chapter 1 the verse count, word count and letter count are all primes.

• Verse count is 7 (prime number).
• Word count is 29 (prime number).
• Letter count is 139 (prime number).

How could an illiterate man who lived 1400 years ago have known about prime numbers?

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