Windows 10 build 19533

Windows 10 build 19533 is an unleaked build of Manganese. It was found on 28 April 2020 at the description of a Feedback Hub quest about the graphing function of Calculator, where it was stated that "the Graphing feature is available on Windows 10 build 19533 or greater." Two days later, the Windows Insider Program answered on a Twitter thread that build 19533 was an internal release.