Prime Numbers Activity

Make your own prime number chart!

Click on any number:

• its multiples get marked blue (definitely composite numbers).
  
• it is marked gold if it might be a prime number,

Keep marking numbers, until you've revealed all the prime numbers and composite numbers.

Oh, and 1 is neither prime nor composite, so you can't mark it.

Question: if you could choose "1", what would happen?

Question: what happens if you don't mark the first few numbers on the chart?

Question: do you need to mark every number, or is there a smart place to stop?