Binary repunit
EncodingsThe binary representation has at least two digits, all 1.
1 in 55,556
Change a digit and watch the patterns and score respond.
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No one-digit change improves this score. Try changing two digits.
The percentile compares this score with every supported number. Each exact number is equally likely on a random roll.
The binary representation has at least two digits, all 1.
A number greater than 1 with exactly two positive divisors.
At least two binary digits read the same in reverse.
At least four digits strictly alternate between rising and falling.
Exactly one pair; every other digit appears once. Two-digit repdigits are excluded.