Changelog
What changed here and when, corrections included. If we published something wrong, it is listed below rather than quietly fixed. Spotted something else? Tell us.
5 August 2026
- Corrected an inaccurate usage example on the number pages. Every page for a value up to 3999 carried the line "Monarch and pope names, for example the Nth of a royal line". There is no 487th monarch and no 999th pope, so the sentence was true for the first two dozen numbers and false for the rest. It has been removed, not replaced: where no real usage exists, the section is now left out.
- Narrowed the reference pages to the values people actually look up. Every number from 1 to 100 and every year from 1900 to 2099 keeps its page, alongside the higher numbers and earlier years that Search Console shows readers reaching. The rest now redirect to the 1 to 1000 chart or the years index, and every value from 1 to 3999 still converts instantly anywhere on the site.
- Added a public account of who maintains this site, what rule set the conversions follow, and how that rule set is tested. See the about page.
- Added an automated test suite over the conversion logic, covering all 3,999 values in both directions. It runs on every build, so a wrong numeral cannot reach the site through a code change. It found and fixed one real defect: non-whole numbers were quietly rounded instead of refused.
- Fixed the embed credit. The link inside the embedded widget could never be seen by a search engine, so the embed page now offers a snippet that puts a normal link in your own page, and says openly that no credit is required.
- Allowed AI crawlers explicitly in robots.txt, and removed a Host directive that no search engine has honoured for years.
- Rewrote llms.txt so the coverage it describes matches the site, and added the extractable rules an assistant can quote.