With new updates to devices often comes a breakage in any existing root method. Such was the case with the Transformer Prime but someone has posted what looks to be a pretty safe method after a rocky start. You might want to read through the full thread (7 pages as of the time of this writing) to make sure you’re in-the-know about any hiccups that may impede your progress. You can find full download links and instructions at the link ahead. [XDA, Thanks Jeff!]