Keep in mind that Google is not going to update Page Rank of websitesGoogle's PageRank formula assesses the importance of web pages without human analysis of the content. PageRank is a numeric value that represents however important a page is on the online.
PageRank is an algorithm used by Google Search to rank websites in their search engine results. PageRank was named after Larry Page, one of the founders of Google. PageRank is a way of measuring the importance of website pages.
Page Rank works by counting the number and quality of links to a page to determine a rough estimate of how important the website is. The underlying assumption is that more important websites are likely to receive more links from other websites.