Slight correction, while the exponent is indeed fixed, it is larger than a f32/f64 exponent: https://gmplib.org/manual/Floating_002dpoint-Functions
However, this is not exposed in all GMP wrappers.
However, this is not exposed in all GMP wrappers.
In fas you have to specify the sizes (of mantissa and exponent) during compile time. So the size of this type is fixed. Thus, there is no heap involved.