Prime Numbers Activity

Make your own prime number chart!

Click on any number to have it:

Keep marking numbers, until finally you will have a list of only 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 if you don't mark the first part of the chart?

Question: do you have to mark the whole chart, or can you stop somewhere?