0
Anonymous
3, 5
5, 7
11, 13
17, 19
29, 31
41, 43
59, 61
71, 73
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There are eight twin prime pairs less than 100 [(3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), and (71, 73)].
43
6
Just 3 + 3
Only one pair.