I've been using the same number for some months and still nothing. I've been wondering something, IF I found out the combination of the day, is it agaisnt the rules to share it with my friends?
Just wondering.

- I could be wrong, but I think it's different for everyone.

I am like 90% sure it is the same for everyone.
First sentece implies it is always the same. Second sentence makes me think I can share it with my friends but I would love to be sure, I wouldn't appreacite a warning for share it with the community if I find it, so I'd love to know about that u___u

it's different for everyone :) Also the easiest way to win is to play very soon after the site resets at midnight Subeta time, as there is a limited number of available 'wins' per day. I used to play the same number every day right after the site reset and won a handful of times before I stopped doing it :D
So it's not about the correct number but abouT being fast? Well, that's confusing now! oTL

No, not necessarily. I'm not sure if the number has to do with it, I think that part is actually random - which is why people can win with different numbers. BUT since only a certain number of people can win every day, the wins get 'taken up' earlier in the day. Does that make sense?
[edit] Like just because you might be the first person to play it for the day, doesn't mean you'll win - it's still random :P
Oh, okay, well, that kind of makes sense and if number's different for everyone, I guess it's pointless to share if I win. Thank you for the advice!
Oh, and by any chance, is there a prize or something for cracking the safe?

no problem! And um, there's an achievement for the first time you get it, and there are also some item prizes... I don't remember what they are, but there's a book and some other stuff. SubetaLodge would probably have the list, if you did like an item notes search maybe?
Nice idea, I found them!
[item=How To: Safe Crackery] Gonna try harder and first moment of the day again tomorrow. Thank you for all the info <3 The description of the game ain't completely explanatory.

I also just found on SubetaWiki that, along with one of those items, you get a random amount of sP (I don't think it's a ton though) and a random r99 item :D