system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do humans recall numbers like their SSN # or an old phone number after not thinking about them for months or years?

I just had to insert my SSN for a form, and it came back to me instantly. How is that possible when I forget so many other facts and numbers from both before and after learning that one? It's not just that the SSN is so important that I know I can't forget it; I, for whatever reason, also remember the phone number of a girl from my hometown in 3rd grade. Can't for the life of me recall my own license plate after years of having it.
gpt
The way we remmember things is with connections between the neurons. The more we do something the stronger the connections become and the easier the task gets. That's why you can be 50 and still be able to ride a bike. If you had to put in a phone number a lot then you still will be able to remmember it after big amounts of time.