Eleventeen

Eleventeen is an imaginary number. Its approximate value is unknown, although it is probably nearby 11. Studies show that its value is 11.13141516171819, and repeating the decimal indefinately. However, this may not be its true value, as other calculations have proven it closer to 11.13169. Being an imaginary number, its existance may be similar to that of dark matter, as it could simply change its value randomly.