Inconsistent display/handling of integers

[goualard-f]

Describe the bug

Integers are inconsistently displayed and manipulated in the "Calculations" app depending on their number of digits.

• If the number of digits is less than 26, the value is displayed as an integer in full, alongside its approximation in scientific format;
• If the number has between 26 and 30 digits, only the approximation in scientific format is displayed but the integer value with all its digits is accessible by inspecting the result with the "up" arrow;
• If the number has more than 30 digits, only the approximation in scientific format is displayed and the correct integer value is not accessible at all.

Examples:

• $24! = 620448401733239439360000$ (24 digits: printed as an integer in full);
• $28! = 304888344611713860501504000000$ (30 digits: printed in full provided we inspect the result with the "up" arrow);
• $29! = 8841761993739701954543616000000$ (31 digits: only approximated to 14 digits---may vary depending on the number of significant figures chosen---as 8.8417619937397e30).

Even more troubling:
When the integer has more than 30 digits, it seems it is never stored as an integer and only its approximation is accessible. Case in point: when I compute

$29! - 8841761993739701954543616000000$

I get $1.954543616e15$ instead of $0$ and the expression displayed after the computation is not what I entered but:

$29! -8.8417619937397e30$

Screenshots

To Reproduce

Steps to reproduce the behavior:

1. Go to the 'Calculations' app
2. Type '29!-8841761993739701954543616000000'
3. See error

Expected behavior

The user should be able to inspect all the digits of an integer, irrespective of its number of digits. An integer should not be approximated without at least some kind of warning.

Environment

• Epsilon version (Settings > About > Software version): 20.4.0
• The platform(s) on which the problem happens: online simulator, actual device, etc...
  Online simulator. Actual device should also be affected.