I have noted the following guesses. All of them are valid guesses that no one else has guessed.
DezNutz......Yes you can change your guess later. The only restriction is if someone tries to guess the number you have already guessed. This would mean they couldn't get the guess they wanted because you had guessed it so they went to a different guess. If this happens you will be locked in with your guess. So far there have been no duplicate guesses so this does not seem likely to happen. If you want to change your guess later just post it and I will tend to the change.
Jackpasdecartier
DezNutz
Boosb
Mephistopheles
Captain_Hawk
All these guesses have been noted.
thanks and good luck.
Thanks to Malichi for advancing the 2.5 million he is putting into the prize.