Ok, I'll try. The Event number is a number allocated to that event, or even to that event type. As you say it is a standard number used to identify that event or event type.
As you will see in the images at
this site clicking on an event in the Event Viewer windows brings up an Event Properties window which refers to that event (you can see that the Event ID matches the Event number - in this case 36).
The bottom two lines in the Event Properties Description pane give the opportunity to get further information using the Help & Support Centre at Microsoft (url). If you click on that, information including the Event Number is sent to MS, a search is made for info on that type of event, and that info is displayed. I have done this with one of my Event Log entries - see the attachment below.
Send one of your events to MS and see if any further info is available. Scroll down to see what action you should take, probably none as in
this.. Note that the Event ID 1517 shows here too.
So, to summarise, the Event Number is used by the online MS Help & Support Centre to identify the event, or event type, and provide further info.
I don't know if a complete on-line list of event numbers and information is available but there's a lot of them, the highest number in my Application Event Log is 11729.
Hope this helps.
Good luck.
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