How many..

[Calon]

How many reputation points do I need for "reputation alerting power"?

(So I get 1 rep power)

[Judge Judy]

From FAQ:

Reputation Power
Rep power is the amount of points that you can take or give to some one's reputation. Your rep power increases by 1 point for every:
- 5000 posts
- 600 reputation points
- 365 days (1 year) registered on the forum

So you need to do either of those to get up one rep power.

[e5]

100 posts activates your reputation.