How to find our Flickr ID?

How to find our Flickr ID?
In some themes or templates blog and feedburner often we are asked to enter Flickr ID is not our Flickr URL.

"Flickr ID" is not your Flickr screen name. This is a value (eg 44,124,460,868 @ N01) you may find within photo URLs, or in the URL of your original Flickr photostream feed. Your Screen Name is a friendly replacement ID you can set up in your Flickr account.
Well how are we to look for ID did it go?

flicker id comment

google have picasa, yahoo! also have a flickr. If the ID that is unique on flickr for json format can not be filled with the name / nick listed on the account? Why?

know baseball ?
but after I tried to search on google with "search flickr id" there is one web to look for flickr id is http://idgettr.com/: we just 
1. enter the username our flicker http://www.flickr.com/photos/username/ in http://idgettr.com/, 

idGettr

2. username flicker can we find in Flickr Your Photostream, 
3. we copy and paste the username you an example:
    http://www.flickr.com/photos/ionebacero/
4. continued to the outboard in http://idgettr.com/ and click the find button,
5. will appear later we flckr id.

Just like that, may be useful thank you.