https://bugs.documentfoundation.org/show_bug.cgi?id=114879

            Bug ID: 114879
           Summary: Calc: comparison "=" of two large numbers incorrect
           Product: LibreOffice
           Version: 5.1.6.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: [email protected]
          Reporter: [email protected]

Description:
Comparison of two large numbers (using the operator "=") within a function
gives wrong result.

Example: two cells contain a big natural, different only by 1:
A1 := 1 330 207 388 348 513
A2 := 1 330 207 388 348 514

A third cell compares them:
=IF(A1=A2;"yes";"no")

==> result "yes"

The result is wrong.

Steps to Reproduce:
1. see example in "Description"


Actual Results:  
The comparison gives wrong result. There is no warning that the numbers are too
big to be handled by LibreOffice Calc.

Expected Results:
The comparison should state correctly that the two numbers are *different*.


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 5.1.6.2
Build ID: 1:5.1.6~rc2-0ubuntu1~xenial2
CPU Threads: 2; OS Version: Linux 4.4; UI Render: default; 
Locale: fr-FR (en_GB.UTF-8); Calc: group



User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:57.0) Gecko/20100101
Firefox/57.0

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