Numerical accuracy on the HP Prime (in Python, Home, and CAS)

[parisse]

1e50 mod 2*pi can not be computed with any significant digit using "normal" precision. The reason is that the relative error rounding any floating point number will be say 1e-17 (it's 2^(-53) for double precision inside MicroPython, 2^(-48) for Xcas/CAS normal precision), that's an absolute error of 1e33 for 1e50, and that's much greater than 2*pi.
This is something that everyone doing scientific computation should know, if it's not teached in a course during highschool or first years of University, there is a real problem.