Numbers /2
How rare is 2?
2 scores 1,444 and sits in the Singular tier — 1 in 250,000 of all supported numbers score this high or higher. Everything below is computed from a complete analysis of all 1,000,001 numbers in range.
RNGdle.net’s own rarity score. Top <0.01% means that proportion of supported numbers scores at least this high. Every exact number has the same chance of being rolled. How this differs from EP · Badge guide
These notes make the number easy to read, but they add no score unless a separately counted rarity signal appears below.
Equal to k! for some k.
Factorization · signal frequency
Only 10 of the 1,000,001 supported numbers have one digit.
Range · signal frequency
This number's digits add up to an uncommon total.
Arithmetic · signal frequency
This number uses an uncommon count of distinct digits.
Repetition · signal frequency
2 raised to an integer power.
Factorization · signal frequency
Appears in the Fibonacci sequence.
Factorization · signal frequency
Divisible by the sum of its digits.
Arithmetic · signal frequency
Divisible only by 1 and itself.
Factorization · signal frequency
Strongest signal: Factorial. It appears in 9 supported numbers and contributes +335 after correlation decay.
Why is 2 unusual? Only <0.01% of the 1,000,001 supported numbers receive an equal or higher rarity score. This number falls in the Singular tier. Scoring is grounded in the exact frequency of each detected trait — rarer traits carry more information and contribute more to the score.
Algorithm version 1.1.0
Patterns in this number
Each of these has its own page explaining how common the pattern is and why.
Harshad Numbers
A Harshad — or Niven — number is divisible by the sum of its own digits. 18 works because 1 + 8 = 9 and 18 ÷ 9 = 2.
Prime Numbers
A prime has no divisors other than 1 and itself. They are the building blocks every other number is assembled from.
Powers of Two
Each power of two is double the last: 1, 2, 4, 8, 16, and on up through 1024, 65536 and 524288. Doubling exhausts the range in only twenty steps.
Fibonacci Numbers
Each Fibonacci number is the sum of the two before it: 1, 1, 2, 3, 5, 8, 13 … reaching 832040 before the range runs out.
Factorial Numbers
A factorial multiplies together every whole number up to k: 5! = 120, 7! = 5040, 9! = 362880. The next one after that already overshoots a million.