Funny how we remember some numbers our entire lives, despite never using them. I can still rattle off my ICQ number, last used nearly 25 years ago, my compuserve ID which I left in 1998, my phone number as a kid, last used about 1994.

I also remember various license plates my family had in the mid 90s, but I struggle to remember my own license plate number now. The only two phone numbers I know are mine and my wife's. I can still remember my high school's phone number though - for some really odd reason as I can't have phoned it much.

When I was 7, my dad wrote a "game" in BASIC on the Commodore 64, and one section required a "secret" (you could see it if you listed the program...) code to gain access. The code was 32744. I have not used that game for more than 40 years, but it'll probably be one of the last things I remember...

> I can still remember my high school's phone number though - for some really odd reason as I can't have phoned it much.

Any chance it was a number your parents made you learn, or on a phone list next to / on the phone?

The most important numbers you can commit to memory are your emergency contact's phone number, your wedding anniversary, and 2ⁿ ∀n ∈ ℤ [1, 24].

I think that the reason why I remember it vividly is because I used it for logging in for years.