Pretty glad the 9 foot long Arthopleura centipede went extinct 300 million years ago. No one wants to deal with that thing.

We've still got this:

https://en.wikipedia.org/wiki/Eunice_aphroditois

Thankfully they don't live on land.

It was a millipede, not a centipede, which probably ate fungi or decaying plants.

So it was not a dangerous predator, though it could have been poisonous, like many modern millipedes.