Taking these into account, Victor Allis calculated an upper bound of 5×1052 for the number of positions, and estimated the true number to be about 1050.
River Shannon | Shannon | Molly Shannon | Lucky Number Slevin | Claude Shannon | Sharon Shannon | Shannon Tweed | Shannon Noll | Reynolds number | Mach number | serial number | Random number generation | International Standard Book Number | prime number | Personal identification number | number | Del Shannon | Two in a Million/You're My Number One | Social Security number | Shannon River | Shannon McNally | Shannon Elizabeth | Shannon Briggs | Shannon Airport | Rikki Don't Lose That Number | Prime number | Premium-rate telephone number | Jackass Number Two | Shannon Ryan | Shannon Moore |