8 random numbers is a decent password. Not really good though, but it would serve the purpose i suppose

 

Someone trying to break in to it would know to try all numbers, which gives you 100,000,000, which is kind of a lot but not anywhere near to be un-hackable 8 random characters is far stronger. But that said, it's not like people would be trying to break in to the RG on a regular basis It *should* be fine.