Question

find the prime numbers which are ending with the 3 and 7 from 100 to 150

Answer 1

The numbers that are left after doing this will need to be factored. Although there are other divisibility rules that you can use to eliminate more numbers, those above and the quickest and easiest to identify.

101: 1, 101103: 1, 103107: 1, 107109: 1, 109113: 1, 113119: 1, 7, 17, 119121: 1, 11, 121127: 1, 127131: 1, 131133: 1, 7, 19, 133137: 1, 137139: 1, 139143: 1,11, 13, 143149: 1, 149
4 times 3
3 times 7

Answer 2

3 , 7,13,17,23,,37,43,47,53,67,73,83,97