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Pattern
Repdigit number
At least five repeated digits
Exactly four repeated digits
Exactly three repeated digits
Multiple digit pairs
Exactly one digit pair
Consecutive repeated digits
Exactly two distinct digits
Palindrome number
Consecutive ascending digits
Consecutive descending digits
Ascending segment
Descending segment
ABAB pattern
ABCABC pattern
Alternating parity
Zigzag digits
Harshad number
Happy number
Prime number
Semiprime
Perfect square
Perfect cube
Power of two
Fibonacci number
Triangular number
Factorial
At least 100 positive divisors
Binary palindrome
Mersenne number (binary repunit)
Hexadecimal repdigit
Minimum digits
1
2
3
4
5
6
7
Minimum digit sum
Find matches
Rarest numbers
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