# Primes

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I would like to bring something up that I discovered in 5th grade. All primes other than 2 and 3 can be expressed as 6n + 1 or 6n - 1. I think I know why, but I would like to see some other ideas...

My Ideas

• 6n, 6n + 2, 6n - 2 are all even.
• 6n + 3 is a multiple of 3.
• 6n + 1 and 6n - 1 are the only remaining possibilities.

Note by Ashwin Padaki
3 years ago

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This is very true

- 3 years ago

But can it be proved in another way?

- 3 years ago