Among the 377 results that OpenAI announced on October 6, 2026, one stood out. It claimed to settle the “quasi-Riemann hypothesis” — a weaker version of the Riemann hypothesis, which is arguably the biggest open question in math. The new proof is, as Jared Duker Lichtman (opens a new tab) of Stanford University put it, “the most significant AI-for-math achievement so far, by quite a margin.”
The Riemann hypothesis has been an open problem for over 160 years. Resolving it would enable mathematicians to better understand the nature of prime numbers, one of math’s most crucial building blocks. And that’s just for starters.
The implications of even the more limited “quasi-RH” result are “staggering,” said Maksym Radziwiłł (opens a new tab) of New York University. “In a sense, the vast majority of consequences of RH already follow from quasi-RH.”
Moreover, contrary to what mathematicians had long expected, the proof didn’t need to introduce any new concepts — it instead unearthed hidden connections between old ones. “The proof is a surprising synthesis of well-known ideas,” said Alexander Dunn (opens a new tab) of the Georgia Institute of Technology.
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