The Numbers Everyone Picks (and Why You Should Avoid Them)

Most Australians who play the lottery believe they are making a free choice when they select their numbers. In practice, the majority of players cluster their picks into the same narrow band, and that clustering has a direct effect on how much a Division 1 winner actually receives.

The numbers that attract the most player attention sit almost entirely between 1 and 31. Not because they win more often, but because they correspond to dates on a calendar. In Saturday Lotto, numbers 32 to 45 make up 31% of the pool yet appear in a far smaller share of player-chosen tickets.

Why Do Players Cluster Around 1–31?

Because no calendar date exceeds 31, this habit produces a near-universal bias toward the lower third of any lottery's number pool. In Australian Powerball, which draws seven numbers from a pool of 1 to 35 plus a Powerball from 1 to 20, a player using only birthday numbers has a maximum range of 1 to 31. Numbers 32 and above are systematically under-picked across the entire player population.

The same pattern applies to Saturday Lotto, which draws from 1 to 45, and Oz Lotto, which draws from 1 to 47. The table below shows how much of each game's pool a birthday-only player can never reach.

The top of each pool is populated by far fewer player selections than the bottom, despite every number having an identical probability of being drawn.

Which Numbers Are Chosen Most Often?

No Australian lottery operator publishes data on player number selection frequency, so exact figures are not publicly available. However, research into lottery behaviour across comparable games internationally, combined with Outnumber's analysis of 62 draws since 2019 and jackpot sharing patterns, supports a consistent picture: numbers 7, 8, 11, and dates corresponding to common Australian birth months are systematically over-picked.

Numbers above 31 appear in a minority of player-chosen combinations. Numbers like 38, 41, and 44 in Saturday Lotto, or 33 and 34 in Powerball, are selected by a substantially smaller share of players despite having the same mathematical likelihood of appearing in a draw.

The result is a two-tier distribution: a crowded lower band and a largely empty upper band, created entirely by player habit rather than any property of the numbers themselves.

What Happens to a Prize When Everyone Picks the Same Numbers?

Division 1 prize pools in Australian lotteries are divided equally among all winning tickets. If four tickets match the winning combination, each receives one quarter of the Division 1 pool. If fourteen tickets match, each receives one fourteenth.

This structure means the monetary value of a win depends not only on whether your numbers are drawn, but on how many other players held the same combination. A jackpot of $20 million divided among ten winners pays $2 million each. The same jackpot won by a single ticket pays $20 million.

The probability of your numbers being drawn is identical regardless of what combination you chose. The probability that your win will be shared depends heavily on whether you picked numbers that other players also chose.

How Does Avoiding Popular Numbers Change Your Expected Payout?

Playing numbers above 31 does not improve your odds of winning. The draw is random and each number has an equal probability of selection. What shifts when you avoid the 1–31 cluster is your expected prize value if you do win.

A combination drawn entirely or mostly from numbers above 31 is statistically likely to be held by fewer players than a combination in the birthday range. Fewer co-holders means a larger share of the Division 1 pool per winning ticket.

Outnumber's number generator weights picks toward the under-selected range specifically to reduce expected prize-sharing exposure. The Contrarian Score assigned to each set of numbers estimates how few other players are likely to hold the same combination, based on historical number selection patterns.

To be clear: the score does not affect how often a combination is drawn. A set of numbers with a high Contrarian Score wins no more frequently than any other set. The difference only matters if those numbers are drawn, at which point a less popular combination is more likely to deliver a larger individual payout.

Does Playing Unpopular Numbers Actually Make a Difference?

The practical effect depends on the game and the jackpot size. In Powerball draws with large jackpots, ticket sales increase sharply. More players means more total combinations in play, and more tickets holding popular number combinations. This amplifies the sharing effect: a Division 1 winner with a birthday-heavy combination in a high-sales draw faces a statistically greater risk of splitting the prize than the same combination in a low-sales week.

For Saturday Lotto, which has more frequent Division 1 winners and lower per-draw jackpots, the same dynamic applies at a smaller scale.

In any draw, avoiding heavily picked combinations reduces your expected prize-sharing exposure. The size of that reduction depends on how many other players are in the draw and how heavily your specific combination is picked relative to alternatives.

Frequently asked questions

Does playing numbers above 31 make me more likely to win?

No. The probability of any specific combination being drawn is identical regardless of which numbers you choose. Playing above 31 is a prize-sharing strategy, not a winning strategy.

Are birthday numbers unlucky?

No. Numbers between 1 and 31 are drawn just as often as numbers above 31. The issue is not that birthday numbers lose more often; it is that more players hold them, which means a win on those numbers is more likely to be shared.

What is the most popular lottery number in Australia?

Lottery operators do not publish player selection data in Australia. Based on lottery behaviour research internationally, single-digit numbers and numbers corresponding to common birth months attract the most player attention. Numbers above 31 are consistently under-picked.

Is Quick Pick better than choosing my own numbers?

A computer-generated Quick Pick produces a truly random selection, which means it is not biased toward the birthday range. However, Quick Picks are also not weighted away from popular numbers: they are uniformly random across the full pool. A strategy-based selection weighted toward the upper number range reduces sharing exposure more deliberately than a uniform random pick.

How many people typically share a Division 1 prize?

This varies widely by draw and game. In high-jackpot Powerball draws, Division 1 is frequently won by multiple tickets. In lower-jackpot draws with fewer total tickets sold, sole winners are more common. The pattern of sharing correlates with ticket volume, which increases as jackpots grow.

If gambling is affecting your finances or relationships, Gambling Help Online offers free, confidential support at gamblinghelponline.org.au or on 1800 858 858.