Write down all prime numbers.
4,6,8,9,10,12,14,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30
1,4,9,16,25
2,3,5,7,11,13,17,19,23,29,31