DailyLoading
RNGdle
One random number a day, scored on what it is made of. Press once, watch six digits land, and find out how rare the number you were handed actually is: every roll is checked against thousands of mathematical properties, and the rarest one it hits is what your roll gets called.
How to play RNGdle
The rules, how rarity is measured, and the questions people ask.
How to play RNGdle
The rules, how rarity is measured, and the questions people ask.
How to play
- 1Press Generate once. You get one number between 0 and 1,000,000, drawn at random, and one a day.
- 2The number is checked against thousands of properties at once: how it factors, how its digits sit, what sequences it belongs to, what it looks like in binary.
- 3Every property it hits is a badge. Badges arrive one at a time, rarest first, each lighting up the part of your number that earned it.
- 4A badge is worth entropy points in proportion to how hard it is to get. Dividing by seven is worth 700 EP because roughly one roll in seven does it.
- 5Your roll is called after its rarest badge. Most rolls are common. A mythic badge lands about once in every fourteen hundred rolls.
- 6Rolls reset at 8pm Eastern, not at midnight, so the new number arrives while you are awake.
Questions
How do you play RNGdle?
You press one button. A random number between 0 and 1,000,000 appears, and then the game tells you everything interesting about it: whether it is prime, whether its digits mirror, what it divides by, whether it is a Fibonacci number, what it spells in hexadecimal. Each of those is a badge. There is no skill and nothing to guess. The whole game is finding out what you were given.
How is a badge's rarity decided?
By counting. Before the game ships, every badge is tested against all 1,000,001 numbers you could possibly roll, and its rarity is the exact share of them that earn it. Nothing is estimated and nothing is assigned by hand, so a badge that sounds impressive but fires on a third of all rolls is labelled common, and the game says so.
What are entropy points?
EP is a hundred times the number of rolls you would expect to make before seeing a badge once. A badge one roll in ten earns is worth 1,000 EP; a badge only one number in the whole range earns is worth a hundred million. It is not a score you can play better, it is a measure of how hard your number was to find.
What decides my roll's rarity?
The rarest single badge you earned. Thirty-odd badges land on an average roll and almost all of them are ordinary, so the one at the top is the only one worth telling anyone about. Trash is the exception: a roll whose entropy lands in the bottom of the distribution gets its own word regardless.
Can I roll more than once a day?
Not in a normal browser window. The roll is written to your device the moment you press the button, before the animation even finishes, so refreshing mid-spin does not get it back, and a second tab reads the same store and shows you the same number. A private window is the exception and rolls freely: nothing it stores survives being closed, so there is nothing there for a daily limit to hang on. There is no account and no server here, so the limit was always a ritual rather than a rule.
When does RNGdle reset?
At 8pm Eastern, every day. Not midnight, so the new number lands in the evening when people are actually around for it. The countdown under a spent roll is exact and follows daylight saving on its own.
How many badges are there?
Over two thousand, and they come from real mathematical properties rather than a list someone wrote out. Primes and their species, divisor counts, digit patterns, figurate numbers, Collatz walks, base conversions, Roman numerals, dates and clock times, and a few hundred specific numbers that mean something to somebody.
More ways to play
Want a score against everyone else? Today's puzzle and the Global Gauntlet both put you on a leaderboard. More remakes: Silverbrook, Songless Unlimited, Bandle Unlimited, MapTap Unlimited, Poople Unlimited and Songspot.