Factor (http://factorcode.org/ http://factorcode.org/) supports that syntax: 3,400,000,000 3400000000 = 9,312 9312 = 4,294,967,296 4294967296 = It's

Factor (http://factorcode.org/ http://factorcode.org/) supports that syntax: 3,400,000,000 3400000000 = 9,312 9312 = 4,294,967,296 4294967296 = It's pretty useful for writing large numbers.