Published: · Updated:
Computed with engine art-1.0.0. Data updated: 2026-09-26 (UTC). Rules independently implemented by RNGDLE.ART.
How the rarity score is built
Every number is checked against 31 independently implemented patterns. A match is a hit, and a feature found in fewer numbers carries more information. Our counts come from evaluating every integer from 0 through 1,000,000, without leading zeros. The denominator is 1,000,001, including both endpoints.
| Pattern | Numbers that match | Share of the range |
|---|---|---|
| Fibonacci number | 30 | 0.003% |
| Repdigit number | 45 | 0.0045% |
| Palindrome number | 1,989 | 0.1989% |
| Prime number | 78,498 | 7.8498% |
| Harshad number | 95,428 | 9.5428% |
A prime hit alone covers about 7.8% of the range, so it does not establish exceptional rarity. Multiple hits can add information, but they can also overlap: every repdigit in our definition is already a palindrome. Multiplying their separate probabilities would overstate how unusual that combination is.
RNGDLE.ART converts exact feature frequencies into −log₂(probability), discounts overlaps within each scoring family, and includes digit sum, distinct-digit count and short-length information. The weighted total is multiplied by 20 and rounded once. The methodology explains the formula and all 31 pattern counts.
Official RNGdle uses badges and EP (entropy points). Its rules page explains rarity, but our independent score does not reproduce official EP.
Why pattern-based rarity is useful
- Reproducible. Anyone can re-check a number under the same engine and get the same score.
- Consistent comparisons. All numbers use the same reference range and rules.
- Free to inspect. You can analyze and compare numbers on this site without an account or payment.
Where the score breaks down
- Common patterns can look impressive. A mathematical name or a long badge list does not automatically mean a high score.
- Unimplemented patterns are invisible. A feature outside the rules has no direct contribution, however interesting it looks.
- The range matters. These exact shares apply only to 0–1,000,000. This analyzer does not score out-of-range inputs.
- A score is not a forecast. Earlier rolls do not make a particular next result more likely in an independent uniform draw.
Who should (and shouldn't) use a rarity score
Should: daily-game players checking a roll before sharing, people comparing two numbers, and teachers or writers looking for a concrete way to explain a mathematical property.
Shouldn't: anyone treating the score as a lottery predictor, betting signal or official EP calculator. It describes number features under our stated rules.
Step by step: check your number's rarity in 60 seconds
- Open the RNGDLE.ART analyzer and enter your exact number, from 0 through 1,000,000.
- Read the tier, score and Top % first. A smaller Top % means fewer numbers score at least as highly; ties are included.
- Scan the pattern list. Separate low-frequency hits such as repdigits and Fibonacci numbers from more common ones such as primes and Harshad numbers.
- Use Compare to put two candidates side by side if you are choosing what to share.
- Open the linked pattern pages to see each rule, exact count and share of the range.
Frequently asked questions
Is RNGdle rarity random?
A roll can be random, but RNGDLE.ART's analysis is deterministic: the same number and engine version give the same score. The score describes features and does not predict a future roll.
Why is my score low even though my number is a palindrome?
Our palindrome rule matches 1,989 numbers, about 0.1989% of the range. The final score also depends on other patterns, digit sum, digit diversity and short length, with overlapping signals discounted. One badge alone does not determine a tier.
Does the game use AI to decide rarity?
RNGDLE.ART uses 31 implemented pattern rules and exact feature distributions, not an AI judgment. This describes our calculator, not the internal implementation of rngdle.com.
Can I raise my rarity score?
You cannot change a past number's score under the same engine. You can analyze other numbers and learn which features contribute to their scores. Official rolls and EP remain under the official game's rules.