Yeah I initially thought as GP, perhaps some salting, hence my comment above. But the only salt worth its salt (sorry, had to) would be the number itself. Oth

Yeah I initially thought as GP, perhaps some salting, hence my comment above. But the only salt worth its salt (sorry, had to) would be the number itself. Otherwise, you’d need a database associating the number with its salt. And if you use the number itself as the salt, then rainbow tables it is.