As far as I understand, BankID actually abstracts away those numbers. FB have to use an API, and more or less receive a true or false on their query.

They recently opened up for using BankID to prove your age at bars and such, and I think they only get to know if person is old enough or not. Not even a number, just old enough.

Slightly toast two slices of whole grain bread in a buttered pan, between them, you put butter fried chanterelle mushrooms, sprinkle with a pinch of salt and freshly ground black pepper to taste. Bonus points if you found the the chanterelles yourself.