Benchmark test e^x^3

[Albert Chan]

With a bit of work, you can extend the range quite a bit.
Example, this is how I do it on my Casio FX-115MS, for x = 0 .. 24

For x = 24, decimal digits ~ 24³/ln(10) ~ 6003.7
For x = 23.99, decimal digits ~ 23.99³/ln(10) ~ 5996.2, a difference of 7.5 digits
Since Casio integrate function only gives 6 digits precision, that is enough.

A = integ(exp(x³), 0, 24)
≈ exp(24³) * integ(exp(x³-24³, 23.99, 24)
≈ 1e6000 * exp(24³ - 6000*ln(10)) * 5.78732e-4
≈ 1e6000 * exp(8.4894421) * 5.78732e-4
≈ 2.81446e6000