Testing the quickest way to retrieve the macOS name (Sonoma, etc.)

[Airy]

There is more information in this thread, including explanations from The Architect.

Large Numbers Gets Treated in Strange Ways

Read the last line of this post. IEEE 754 double-precision binary floating-point format: binary64 Double-precision binary floating-point is a commonly used format on PCs, due to its wider range over single-precision floating point, in spite of its performance and bandwidth cost. It is commonly known simply as double. The IEEE 754 standard specifies a binary64 as having: Sign bit: 1 bit Exponent: 11 bits Significand precision: 53 bits (52 explicitly stored) The sign bit determines the sign …

I think I was wrong on one point. The KM Engine uses both double precision floating point and 64-bit integer formats for some calculations in the Engine. I'm not sure how to determine the occasions that it chooses each format. Most likely it sticks to the 64-bit Integer format unless the string is over 15 digits or contains a decimal point.

Your snapshot above shows 7 digits of precision failing to give the correct result. I'm not sure how that could be, since the KM Engine doesn't use Single precision floating point.