I'm thinking of a number between -7,854 and 495,092,766,169,425.

Can you guess what it is?

UPDATES:

25/11/07 -- The number is between -274 and 486,986,255,435,677.

26/11/07 -- The number is between 4 and 44,444,444,444,444.

27/11/07 -- The number is between 65 and 745,467,999,234.

30/11/07 -- The number is between 836 and 100,855,585,432

1/12/07 -- The number is between 2,097 and 65,095,232,112.

2/12/07 -- The number is between 9,999 and 15,935,135,778.

5/12/07 -- The number is between 100,000 and 11,345,691,038.

6/12/07 -- The number is between 6,422,887 and 9,897,422,322.

7/12/07 -- The number is between 89,990,654 and 5,874,366,067.

THE NUMBER HAS BEEN GUESSED AND IS 4,815,162,342!