I would find it embarrassing to be prisoner number P01135809. I mean, what does a number like that say about your character?
At first, it sounds like the beginning of the Fibonacci sequence. But to be correct, the sequence would have needed to begin P0112358…
That missing digit near the start suggests a certain laziness of thinking. And what is up with that random 09 at the end?
I for one would never trust someone who had a prisoner number like that. On the other hand, if all goes well, nobody will ever need to.