Using POSIX::log10() looks like the simplest solution. I will attempt to pester the tester with a modified version of FormatEng.pm.

Do you think I can simplify it by replacing POSIX::log10(1000) with 3, or will it be better to keep your code as-is? 

    my $e    = floor( POSIX::log10($num) / 3 );

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In reply to Re^5: Portability of floor(log(N)) by toolic
in thread Portability of floor(log(N)) by toolic

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