The 15-bit rand function is a Win32 Perl (MS CRT-based) problem. See Re^3: Rand Wackiness! and thread at A better rand() for Win32 for some further discussion.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

In reply to Re^4: Randomizing Large Integers by BrowserUk
in thread Randomizing Large Integers by hangon

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