The number (or "36k") frequently appears in technical documentation as a build number or a validity period :
Are you trying to a specific piece of enterprise software?
In security contexts, this can refer to a list of usernames and passwords (often from data breaches) that have been "checked" or "validated" as active. 2. Software Licensing and Build Numbers
There is a specific community trend involving downloading .txt files to enable "Premium" or "Advanced" features on or Poco devices (running HyperOS).
Users often download a specific string of code (sometimes shared as a .txt file) to run in a terminal or "SetEdit" app to unlock high-end graphical features or system animations. Are you trying to unlock a feature on a smartphone?