It is the number portion of the page that is the "Fan Page ID" to use on the App page: facebook.com/pages/Mr-Electric-of-Central-Indiana/137409539635096
You can test the usability of the ID by visiting https://graph.facebook.com/putidhere
Below you may find some additional information on how to operate with the Facebook Fan Page type and how to share it.
Once you add a Facebook fan page type to your app, you need to access your app's dashboard. Then go to Application Settings, there you need to fill in the Facebook App API Key and the Facebook App Secret.
As soon as your app is approved and published on AppStore, you need to go to your app's dashboard again at SC and access AppStore Proprieties link. Copy and paste the link to your published app at AppStore to the "Share link" input field and then save the changes.
In order to get the API Key, first you need to go to developers.facebook.com/apps. There, you need to create the app to get both the Facebook API key and Facebook App Secret.
For more detailed instructions upon how to get the API Key you may try checking through the web. As an example: http://www.joomlabyte.com/how-to-get-facebook-api-key.html
