Possible to remove numbers from URL?

[Gimpymoo]

Sorry for vague title.

What I mean is, URL for for this forum is:

http://community.invisionpower.com/forum/497-technical-support/

Is the number needed? Can it be removed?

Thanks.

[Jim M]

Sorry, they are necessary.

[Gimpymoo]

Sorry, they are necessary.

Thanks for the reply, no need to apologise.

May I ask why the name alone cannot be used as a unique identifier?

Could I put the number at the end?

Thanks.