Of all the numbers you see during the course of a day, you remember the ones you pay special attention to. A person doesn't realize they saw the numbers that they don't remember seeing because, well, they're not remembered.

The reason a person pays special attention to a certain number or numbers are likely to be one of these:

• The number has a special meaning for the person.
• The number represents an emotional significance for the person.
• There is an aspect about the number itself that attracts attention, perhaps the way the digits are arranged.

See the Starting to See Certain Numbers Again and Again article for more information about that. And also Why You See Certain Numbers All the Time.