It depends on the person too. I struggle to remember six digits and forget them in hours, but my partner somehow manages to instantly memorize credit card numbe

It depends on the person too. I struggle to remember six digits and forget them in hours, but my partner somehow manages to instantly memorize credit card numbers at a glance and retain them for months. I thought she was tricking me at first, but I tested her and its genuine. I guess some people are just gifted with very good memories.