163954

There is only one set of 3 consecutive odd numbers which are all prime: 3,5 and 7.
If you try something else, you will always end up getting a multiple of 3, 5, 7 or 9. The reason that 3, 5 and 7 are the only odd numbers that are prime is because their only factors are 1 and themselves, which makes them prime. If you take another set of 3 consecutive odd numbers, you will always get one or more composite numbers.
For example, let’s take a look at 13, 15 and 17:
13’s factors are 1 and 13 (itself), so it’s prime
15’s factors are 1, 3, 5 and 15 (itself), so it’s composite
17’s factors are 1 and 17 (itself), so it’s prime
Because 15 has more factors than just one and itself, it is composite and can’t be a set of 3 prime consecutive odd numbers. It is the same with lol the other sets of 3 consecutive numbers (except 3, 5 and 7), but some sets might have two composite numbers.