How do I do prime factorization? My teacher taught us and I forgot how to do it :(

Thank you:) you rock!

You just keep factorising till you can go no further.

144

=2*72

=2*2*36

=2*2*6*6

=2*2*2*3*2*3     they are all prime

=2*2*2*2*3*3

$$=2^3*3^2$$