It looks that the default Hash implementation depends on whether the system is 32-bit or 64-bit [1]. It's also not clearly documented what the default implement

It looks that the default Hash implementation depends on whether the system is 32-bit or 64-bit [1]. It's also not clearly documented what the default implementation of Hash really is. On a 32-bit system, yes, someone could probably do it. [1] https://mathematica.stackexchange.com/a/124340 https://mathematica.stackexchange.com/a/124340