5.1:  1, 3, 11, 15

5.2:  1, 5, 9, 15, 21, 23, 27, 31, 35, 43

5.3:  1-13 (odd), 31, 39, 43, 55, 59, 67

5.4: 3, 5, 13, 19, 21, 31