The first factor pair is always 1 and the number itself. Consider whether the number is divisible, in turn, by 2, 3, 4, etc. Divide to find the other factor of the pair. All the factors are found when ...
2. 3. 5. 7. 11. 13. 17. And so on. This is far from a comprehensive list of prime numbers—if we were to compile and write out an exhaustive list of all known prime numbers, this would be a truly ...