17976931348623157e308

17976931348623157e308 is a numeric token that resembles the decimal scientific notation used to express the largest finite value of an IEEE 754 double-precision floating-point number. In standard form, the largest finite double is approximately 1.7976931348623157 × 10^308.

However, the literal 17976931348623157e308 can be misinterpreted. In many programming languages, a numeric literal written as 17976931348623157e308 would be parsed as 17976931348623157 × 10^308, i.e., about 1.7976931348623157 × 10^324. This exceeds the range of a double-precision value, so it would overflow to infinity or be handled as a larger-than-maximum value depending on the language and numeric type. Consequently, this form is not a precise or portable representation of the maximum finite double.

The canonical representation for the maximum finite double is 1.7976931348623157e308. The exact maximum finite value is (2 − 2^−52) × 2^1023. Values larger than this are not finite in IEEE 754 double precision; the next representable quantity is infinity.

In practice, the magnitude used to test numeric limits is common in programming discussions. Many languages expose a dedicated constant for the maximum finite double (for example, Double.MAX_VALUE or Number.MAX_VALUE), rather than relying on ad hoc decimal strings.