×

# Primes

1 2 3 4 5 6

7 8 9 10 11 12

13 14 15 16 17 18

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.

1 year, 10 months ago

Sort by:

This is very true · 1 year, 10 months ago