Will CMI declare a Millennium Prize Problem solved by ___?
The conditions, incentives and evidence that could shape the answer.The detail that changes the question
A claimed proof can be mathematically exciting while falling short of the event that settles this market. The contract gives the Clay Mathematics Institute the decisive voice, not a model provider, preprint author or social-media consensus.
An official CMI declaration that one of the remaining problems is solved qualifies, as does a prize award. A publicly posted proof alone does not; acceptance of prize money and whether AI helped are irrelevant under the rules. [2]
What the current price does—and does not—show
The API snapshot on October 4, 2026 priced Yes at 37.5% for “Will CMI declare a Millennium Prize Problem solved by December 31, 2028?”. The parent event had $430,384 in cumulative volume. That volume includes trading across the event; it is not a count of distinct people and does not establish the probability of this one contract. [1][2]
Watch CMI’s exact language and whether it constitutes a qualifying declaration, alongside specialist review that clarifies what has actually been proved. Another open contract in the same event, “Will CMI declare a Millennium Prize Problem solved by December 31, 2027?”, was quoted at 12.5% for Yes. Check whether these conditions are mutually exclusive before comparing or combining their prices. [1]
Where the position can go wrong
Do not assume the ordinary prize process mechanically determines the contract: CMI’s prize rules require a qualifying publication, a two-year wait and general acceptance, but this market separately allows a declaration without an award.
The selected child requires CMI’s declaration by December 31, 2028, at 11:59 p.m. Eastern. Other dated children have different cutoffs; a declaration can qualify before a monetary award. [2]
The evidence that would change the reading
Watch CMI’s exact language and whether it constitutes a qualifying declaration, alongside specialist review that clarifies what has actually been proved.
CMI’s standard prize procedure includes a publication-and-review interval. [3] This contract also accepts an official declaration without waiting for an award, so “prize not yet paid” does not by itself establish a No outcome. [2]
WEIGH BOTH SIDES
What would change the outlook?
Will CMI declare a Millennium Prize Problem solved by December 31, 2028?
Quoted market evidence: Oct 4, 2026, 09:57 UTC. The live market panel may show a newer observation.
Watch CMI’s exact language and whether it constitutes a qualifying declaration, alongside specialist review that clarifies what has actually been proved. A Yes case needs evidence that the qualifying condition is or will be met within its window.
Do not assume the ordinary prize process mechanically determines the contract: CMI’s prize rules require a qualifying publication, a two-year wait and general acceptance, but this market separately allows a declaration without an award.
The next signals to watch
- Watch CMI’s exact language and whether it constitutes a qualifying declaration, alongside specialist review that clarifies what has actually been proved.
- The selected child requires CMI’s declaration by December 31, 2028, at 11:59 p.m. Eastern. Other dated children have different cutoffs; a declaration can qualify before a monetary award.
- A change to the exact contract’s rules, resolution status or current executable price. [2]
The dated Yes quote was 37.5%. That is a market-implied price for this question, not an independently estimated fair probability. [2]
An official CMI declaration that one of the remaining problems is solved qualifies, as does a prize award. A publicly posted proof alone does not; acceptance of prize money and whether AI helped are irrelevant under the rules. We do not establish a price advantage from the quote alone. [2]
A FEW GOOD QUESTIONS
What else should you know?
What exactly does this market resolve on?
An official CMI declaration that one of the remaining problems is solved qualifies, as does a prize award. A publicly posted proof alone does not; acceptance of prize money and whether AI helped are irrelevant under the rules. [2]
What is the deadline or observation window?
The selected child requires CMI’s declaration by December 31, 2028, at 11:59 p.m. Eastern. Other dated children have different cutoffs; a declaration can qualify before a monetary award. [2]
What should I check before choosing a position?
Watch CMI’s exact language and whether it constitutes a qualifying declaration, alongside specialist review that clarifies what has actually been proved. Then compare the current contract price with your own evidence-based assessment; this article does not identify a guaranteed or recommended trade.
CHECK THE EVIDENCE
Sources & further reading
- Will CMI declare a Millennium Prize Problem solved by ___? — event and complete rules ↗polymarket.com
- Will CMI declare a Millennium Prize Problem solved by December 31, 2028? — exact contract ↗polymarket.com
- Clay Mathematics Institute: Millennium Prize rules ↗claymath.org
Published . AI-assisted, source-linked analysis. We distinguish evidence from interpretation; this article does not establish a trading edge. How we work →
