What determines the fancy factor?
There are a bunch of different factors that are generally considered to make a serial number "fancy", including the following:Radar Numbers
- serial numbers that read the same forward and backwards, such as 12344321 or 42899824.Ladder Numbers
- serial numbers that have sequential digits, such as 87654321 or 01234567.Repeaters
- serial numbers that have repeating sequence of digits, such as 22992299.Binary
- serial numbers that are made up of only two different digits, such as 23322333 or 88818181."True" Binary
- serial numbers that are made up of only 1s and 0s, such as 10011101 or 01101110.Super Repeater (a.k.a. "Binary Repeaters")
- serial numbers that are made up of only two different digits that alternate, such as 08080808 or 52525252."True" Binary Repeaters
- serial numbers that are made up of only 1s and 0s and that repeat in sequence, such as 01010101 or 10101010.Solid
- every digit is the same, such as 55555555 or 11111111.
And I'm sure there are more I can't think of off the top of my head. In general, though, there needs to be some sort of obvious pattern to the number.
My Coin & Currency Collection
(Dansco 7070 and 8100 albums, Proof Type Set, U.S. Currency Type Set & Foreign Bullion Collection)