Methodology

The Lottery publishes, per game, how many prizes exist at each tier, how many remain, and the overall odds O (the “1 in X” chance any ticket wins something). It does not publish, in the daily feed, how many tickets were printed. We estimate it:

N (tickets printed) ≈ Σ(total prizes across all tiers) × O

Likewise, tickets still unsold ≈ Σ(prizes remaining) × O. Against the few games where the Lottery does print an “approximately N tickets” figure, this estimate lands within ~0.1%. When that official figure is available we use it instead and tag the game official N; otherwise est. N.

current jackpot odds = tickets remaining ÷ top prizes remaining

The estimated “1 in X” chance that a ticket bought today wins a top prize. As unsold tickets fall faster than top prizes are claimed, X shrinks and the odds improve. If no top prizes remain, the jackpot is dead and these odds are infinite.

A scratch game stays on sale until its print run is exhausted or it is officially ended — not until its prizes run out. So the Massachusetts Lottery can keep selling a game after its last top prize has already been claimed, which means a ticket on the shelf may have no chance at the advertised jackpot at all (lower-tier prizes may still be available). This is the single biggest reason InstantMass exists: every game shows how many top prizes remain, and a game with none left is flagged dead so you can see it before you buy — not after.

improvement = launch jackpot odds ÷ current jackpot odds

Launch odds use the full print run (N ÷ top prizes printed). A value above 1× (shown ▲ mint) means today’s odds beat the day-one odds; below 1× (▼ rust) means they’ve worsened.

edge = (% of top prizes remaining) − (% of tickets remaining)

A direct read on whether top prizes are depleting slower than the ticket pool. Positive edge (▲) is favorable: proportionally more jackpots are still out there than tickets sold would suggest. It does not make the game profitable — only less unfavorable than at launch.

The projection answers “if another X% of the print run sells and no top prize is hit, where do the odds land?” — the best case for a jackpot hunter. The neutral case assumes top prizes deplete in step with sales, which leaves the odds unchanged.

• These are estimates derived from published prize counts and overall odds — not official print-run figures. Treat the relative signals (edge, improvement, dead-jackpot detection, the trend over time) as the trustworthy output, not the absolute ticket counts.
• The lottery has negative expected value. A favorable edge narrows the gap; it does not close it. “Better odds” are still long odds.
• Non-cash “for life” / annuity top prizes are analyzed on a best-effort numeric value and tagged annuity; their headline figure overstates cash value.
• Data is captured once daily; counts can lag the Lottery’s live figures. History grows from the day each game is first snapshotted.
• Not affiliated with or endorsed by the Massachusetts State Lottery Commission.