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Will CMI declare a Millennium Prize Problem solved by December 31, 2027?

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Polymarket Closes Jan 1, 2028
LIVE PRICES — YES
PolymarketTrade ↗
48¢ last
BidAsk
YES32¢48¢
NO52¢68¢
$11,682 volume
Listed on Polymarket only. Kalshi does not carry a market that settles on this exact question, so there is no cross-venue price to compare here.
30-DAY PRICE HISTORY
HOW THIS RESOLVES

Polymarket — resolution criteria

This market will resolve to "Yes" if the Clay Mathematics Institute (CMI) awards a Millennium Prize for any of the six remaining unsolved Millennium Prize Problems, or otherwise officially declares any of these problems solved on its website or in an official communication, by 11:59 PM ET on the date specified in the title. Otherwise, this market will resolve to "No". This market will resolve solely based on a qualifying declaration by CMI that one of the six remaining unsolved Millennium Prize Problems has been solved, regardless of whether the solution takes the form of a positive proof, counterexample, disproof, or any other resolution accepted by CMI. A Millennium Prize award will qualify as an official declaration, but is not required; an official CMI statement that a problem has been solved is sufficient on its own. Whether the solution was produced in whole or in part by artificial intelligence, and whether any recipient accepts or declines a prize, will not be considered. A published or publicly posted proof will not qualify on its own, regardless of its acceptance by the mathematical community. The primary resolution source will be official information from the Clay Mathematics Institute (e.g., https://www.claymath.org); however, a consensus of credible reporting may be used to confirm that a qualifying CMI declaration or award has occurred.

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Cross-venue spread
Kalshi last
Polymarket last48¢
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The same question at a different strike, deadline or outcome — related, not the same contract. Prices are the latest YES.