+**1ff** is a [hexadecimal](/wiki/hexadecimal) value representing the integer 511. Often encountered in [computer architecture](/wiki/computer-architecture), it commonly signifies a maximum count or a specific bitmask, marking a full set of nine bits before the next power of two.
+## See also
+- [Hexadecimal](/wiki/hexadecimal)
+- [Binary](/wiki/binary)
+- [Integer](/wiki/integer)
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