Real128

Import can read arbitrary binary data as a sequence of quad-precision numbers.
Export can convert a list of arbitrary integers or reals to binary quad-precision numbers.

Background & Context

Import["file","Real128"] imports any file as 128-bit IEEE quad-precision numbers, returning a packed array of real numbers.
Export["file",list,"Real128"] exports a list of real numbers to file.
Import["file",{"Real128",elem}] or Import["file",elem ] imports the specified element from file.
Import["file",{"Real128",{elem₁,elem₂,…}}] imports multiple elements.
See the following reference pages for full general information:

	Import, Export	import from or export to a file
	CloudImport, CloudExport	import from or export to a cloud object
	ImportString, ExportString	import from or export to a string
	ImportByteArray, ExportByteArray	import from or export to a byte array

General Import elements:
"Elements" list of elements and options available in this file

"Summary" summary of the file

"Rules" list of rules for all available elements
Data representation element:
"Data" list of real numbers
By default, Import and Export use the "Data" element.
Import["file",{"Real128",n}] reads the n quad-precision number from file.
Import returns Infinity for IEEE "infinity", and Indeterminate for IEEE "not‐a‐number".
Trailing bytes are ignored if the size of the imported file is not a multiple of the data size.

Convert a list of integers and reals to IEEE quad-precision numbers:

Convert the previous result back to Wolfram Language numbers:

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	"Elements"	list of elements and options available in this file
	"Summary"	summary of the file
	"Rules"	list of rules for all available elements