There is too much "helpful" title modification of late. The original title itself fits within HN limits:

"A 17-year-old teen refutes a mathematical conjecture proposed 40 years ago"

The site's guidelines are clear[1] but increasingly ignored by some moderators:

"...please use the original title, unless it is misleading or linkbait; don't editorialize."

[1] https://news.ycombinator.com/newsguidelines.html

After several hours, the HN title has been modified again to match the original much more closely, from "Hannah Cairo has solved the Mizohata-Takeuchi conjecture"[1] to "Hannah Cairo: 17-year-old teen refutes a math conjecture proposed 40 years ago".

[1] https://web.archive.org/web/20250706185220/https://news.ycom...

As the submitter, you can re-edit the title after submission (for some limited time period).