Why do my PageRank scores differ between two uploads of the same file?

[alice_seo]

I uploaded the exact same Screaming Frog CSV twice and got slightly different PageRank scores for some pages. Is this a bug or expected behaviour?

[bob_dev]

PageRank is an iterative algorithm that converges — very occasionally floating-point rounding can cause tiny differences in the final iteration. This is expected and the differences should be in the 4th decimal place or less. If you're seeing bigger differences, check whether both uploads are truly identical files (same size, same row count).

[carol_seo]

Also note: if one upload used the 'dofollow only' filter and the other used 'all links', you'll see larger differences. Check your filter settings match between sessions.

[Oliver]

Totally agree with the above. I'd also look at the outgoing links from your strongest pages. If your homepage links to 200+ things it loses focus. Cutting that list to 30-40 links concentrating on commercial pages made a noticeable difference for us.

[Dev]

Just adding a data point: we did this analysis for an 80,000-page e-commerce site and the run time was under 2 minutes in Chrome. No issues at all. The orphan detection alone saved us probably 15 hours of manual audit work.