15

'O guaglione — the boy

No full dossier yet for 15. The Smorfia line below is its place in the Neapolitan book of dreams; more dossiers are written over time.

Smorfia napoletana'O guaglionethe boy

Cultural interest — does not change your odds.

The reality check

What the machines actually did with 15, across every lottery this site holds a long record for.

Powerball96of 103 expected−0.67σ
UK Lotto114of 119 expected−0.51σ
EuroMillions104of 104 expected−0.03σ
SuperEnalotto168of 161 expected+0.58σ
Set for Life429of 378 expected+2.87σ

Across 5 lotteries that hold a 15, its average deviation from expectation is +0.45σ. Statistically ordinary, everywhere.

The one thing a belief about a number can measurably do is change how many people play it — and a jackpot shared more ways is worth less to each winner. That is the only real consequence, and it is arithmetic rather than folklore.