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{{Floating-point}}
{{Computer architecture bit widths}}
In [[computing]], '''quadruple precision''' (or '''quad precision''') is a binary [[Floating-point arithmetic|floating-point]]–based [[computer number format]] that occupies 16 bytes (128 bits) in memory and mostly provides 113 bits ~34 decimal digits of precision and an enormous range from 'denormal' 6.E-4966 over min-normal 3.3621031431120935062626778173217526E-4932 with full precision up to max 1.189731495357231765085759326628007E+4932.
In [[IEEE 754-2008]] the 128-bit base-2 format is officially referred to as '''binary128'''.
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