In the Forever book I’ve seen mention of 5/3/1, PR set. I understand the 5/3/1 notation, but I’ve yet to find a description of what a PR set is. I’m specifically looking at the 5/3/1, PR set in the 3rd Part of Krypteia. Does this just mean that on the last set one can go for a PR? For example, a hypothetical cycle would look like this?

Week 1: 5x65%, 5x75%, 5+x85%

Week 2: 3x70%, 3x80%, 3+x90%

Week 3: 5x75%, 3x85%, 1+x95%

Thanks for the help.