The check digit is used to confirm the initial digits of the card number. The benefits of using a checksum is that it prevents casual attempts to invent credit card numbers, as only one in ten will be valid.
Length (adj). the longest, or longer, dimension of any object, in distinction from breadth or width; extent of anything from end to end; the longest line which can be drawn through a body, parallel to its sides; as, the length of a church, or of a ship; the length of a rope or line.
Who has the longest toenails in the world? The last recorded measuring for the longest toenails in the world was in 1991. Back then Louise Hollis of California won hands down with a combine length of her 10 toenails of 2.21 meters or 87 inches. Louise Hollis' husband gave her a choice: either he goes or the toenails go. She is now single.