La Primitiva number generator
Pull truly random La Primitiva lines in one tap — 6 numbers from 1–49, plus a Reintegro digit from 0–9. Generate up to 10 lines, copy any with a tap. Runs entirely in your browser; nothing is sent to a server.
Generate your numbers
Every line uses crypto.getRandomValues with rejection sampling, so each number is exactly equally likely — no bias, no shortcuts.
Fair by maths, private by design
Many online pickers lean on Math.random(), which isn't built to be unpredictable. Ours uses your device's cryptographically-secure randomness — the same class trusted for encryption keys — and we use rejection sampling so no number is quietly favoured over another. Your picks are made on your device and never transmitted anywhere.
Worth saying plainly: a generator can't predict a draw or improve your odds. Every La Primitiva combination always has exactly the same chance — and at 1 in 13,983,816 for the six main numbers, it is one of the more winnable big-jackpot lotteries. What this gives you is a clean, unbiased, genuinely random line — and the option to take it further with our SHA-256 entropy generators, where your own mouse movement seeds the result.
Questions, answered
How does the La Primitiva generator work?
crypto.getRandomValues) with rejection sampling, so every number is equally likely. Generate multiple lines and copy each with one tap.What is La Primitiva and how much is a ticket?
Can a generator improve my chances of winning?
What are the Reintegro and Complementario?
Are my generated numbers private?
Play for fun, play responsibly
La Primitiva is a game of pure chance, run by Spain's Loterías y Apuestas del Estado. This generator produces random combinations only — it does not predict draws or improve your odds, and every combination is equally likely. Numbers are for entertainment; only the official operator confirms a result or prize. In Spain, lottery prizes above €40,000 are taxed at 20% on the amount over that threshold.