65,535

In mathematics

In computing

• 65535 occurs frequently in the field of computing because it is , which is the highest number that can be represented by an unsigned 16-bit binary number. Some computer programming environments may have predefined constant values representing 65535, with names like.
• In older computers with processors having a 16-bit address bus, 65535 is the highest addressable memory location, with 0 being the lowest. Such processors thus support at most 64 KiB of total byte-addressable memory.
• In Internet protocols, 65535 is also the number of TCP and UDP ports available for use, since port 0 is reserved.
• A Java class or interface can have at most 65,535 methods. The code of a constructor in Java is limited to 65,535 bytes.
• The JavaScript method.charCodeAt will return a number which corresponds with the index of the passed parameter with a maximum possible value of 65535.
• In some implementations of Tiny BASIC, entering a command that divides any number by zero will return 65535.
• In an unpatched version of Microsoft Excel 2007, many mathematical computations evaluating to 65535 will display incorrectly. For example, displays as 100000 rather than 65535. Microsoft reports this to be a display-only bug for only 6 floating point numbers near 65535 and 65536. These display issues do not occur in editions of Excel that have been updated to Office 2007 service pack 2.
• In Microsoft Word 2011 for Mac, 65535 is the highest line number that will be displayed.