When will all Millennium Prize Problems be solved? (Before 2040)

Kalshi Tech Closes Jan 7, 2040 · $98 traded · $28 at stake · prices read 10 h ago

The odds

43%Before 2040

Before 204043%
Before 203531%
Before 203025%
Before 202920%▼ 1
Before 202814%▼ 1

How the odds have moved

Before 2040: 42% on Oct 19, 43% now.

Each outcome's chance over time on Kalshi. The dots along the bottom are headlines about its subject: point at one to read it.

Every outcome

Outcome	Chance	Day	Bid	Ask	Pays	Contracts
Before 2040	43%		38¢	47¢	$2.13	90.00
Before 2035	31%		26¢	35¢	$2.86	36.00
Before 2030	25%		20¢	29¢	$3.45	36.00
Before 2029	20%	▼ 1	15¢	24¢	$4.17	64.00
Before 2028	14%	▼ 1	9¢	18¢	$5.56	200

"Pays" is what a $1 stake returns if that outcome happens, at the price shown (before any fees). Bid and ask are the best prices to sell and buy "Yes".

The news: Millennium Prize Problems

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No recent headlines name this market's subject.

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Odds are traders' prices on Kalshi, Polymarket, ForecastEx and Crypto.com, not forecasts by 4Search. Prices read from the venues just now. Prices may be delayed. Money traded on Kalshi and ForecastEx is estimated from contracts. Not betting or investment advice.

About this market

VenueKalshi

Settles onThe Washington Post, The Economist, Science

Trading closesJan 7, 2040 10:00 AM ET

Traded$98 (427 contracts)

This week$98

At stake$28

Followed here sinceOct 19, 2026

The rules

If all remaining Millennium Prize Problems are independently resolved before Jan 1, 2028 under the Payout Criterion and each resolution remains qualifying through expiration, then the market resolves to Yes.

The full rules are on the market's page at Kalshi.

Reading the odds

A prediction market trades contracts that pay $1 if something happens. Its price is the market's chance: a contract at 62¢ means traders give it 62%. Each number here is the midpoint between the best bid and offer, or the last trade when they are more than ten cents apart.

For a question with many answers (who wins, which range a number lands in), the chances are scaled to add up to 100%. A price ladder ("above 4.25%, above 4.50% ...") gives a whole distribution: its median is where traders see an even chance either way.

Kalshi is a U.S. exchange regulated by the CFTC; its money is counted in contracts, shown here as dollars at their price. Polymarket counts dollars. ForecastEx is Interactive Brokers' exchange, regulated by the CFTC; its contracts too are shown as dollars at their price. Crypto.com lists its markets on Crypto.com | Derivatives North America, a U.S. exchange regulated by the CFTC; it reports the dollars traded. Where more than one asks the same question, each is shown, never averaged.

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Prediction-market prices are what traders pay for each outcome on Kalshi, Polymarket, ForecastEx and Crypto.com, read as the market's implied chance. They are not forecasts by 4Search, can move fast and can be wrong; they are read every few minutes and may be delayed. Money traded on Kalshi and ForecastEx is estimated from contracts at their price. News comes from the 4Search index; prices of stocks, rates and coins from 4Search Finance. Nothing here is betting, financial or investment advice. Terms of use.