How to Play RNGdle

The basic rules

The whole game is one daily loop, and it works the same for everyone on the planet:

1. Every day at 00:00 UTC, the game draws one number between 0 and 1,000,000 for the entire world.
2. Everyone who rolls that day receives that same number.
3. You can roll once per day. There is no reroll, no retry, and no way to pay for a second attempt.
4. When you roll, the game grades the number: a rarity tier from Common up to Mythic, badges for every special property it finds, and a bump to your entropy points.
5. At the next UTC midnight, a new number is drawn and everything resets.

That is the entire game. The depth lives inside the number itself: palindromes, primes, runs of identical or consecutive digits, and cult numbers like 42 or 777,777 all carry extra weight. The badge list catalogues every feature the grading model looks for, and the rarity calculator shows you all of them for any number you care to test.

When does the daily reset happen

The reset is anchored to 00:00 Coordinated Universal Time — UTC midnight, the world's reference clock — and it happens everywhere at the same instant. It is not tied to your local midnight, which is why the game can feel like it resets at odd hours depending on where you live. Find your city (or the nearest one) in the table below and remember that one time; it never changes.

Cities near the equator and most of Asia do not observe daylight saving, so their two columns match. The UTC moment itself never moves.

What you can and cannot control

You cannot control the number. The draw is uniform across the full range: every one of the 1,000,001 possible numbers has exactly the same 1-in-a-million chance, and nothing about the time you play, the device you use, or the rituals you perform will shift it by a single digit. You also cannot reroll — the once-a-day limit is the entire point, the same scarcity that makes daily crosswords and daily word puzzles worth opening every morning.

What you can control is everything around the roll. You choose when to check — right after the reset for maximum freshness, or at a fixed daily moment that fits your routine. You choose how deeply to read the result: a number that looks boring at a glance can hide a twin prime or a perfect power, and the calculator will find it for you. And you choose what to collect: tiers are a once-a-day verdict, but badges are a lifelong album, and chasing the ones you are missing turns even an ordinary roll into a small hunt.

Five beginner tips

1. 1Check the calculator before you judge your roll.

   A plain-looking number can be a twin prime or a hidden perfect power. Ten seconds with the rarity calculator has turned many "boring" rolls into a story — and it tells you the exact percentile to quote at your friends.

2. 2Collect badges, not tiers.

   A Mythic day is a once-in-forever event; a new badge is a regular little win. If you measure the game by badges, almost every week gives you something new — see the full badge list for what to hunt next.

3. 3Learn your local reset time once.

   Find your city in the table above and remember one time. Rolling right after the reset means you never spend the day wondering, and it keeps your daily habit anchored to a fixed moment.

4. 4Judge a number by its properties, not its size.

   Big is not rare and small is not bad. In the rarity model, 4 and 9 out-rank 872,341 — because 4 and 9 are palindromic perfect powers while 872,341 is just... large. Read what a number is, not how long it is.

5. 5Keep rolling on the boring days.

   About 92% of all possible rolls land in Common — ordinary days are the design, not a failure. Entropy points accumulate either way, and the habit is what makes the eventual rare day feel earned.

For the deep end — which numbers are the rarest of all and what a percentile really means — see the rarest numbers page. For the big picture, the home page has the full overview.