From: Tanaka Akira <akr@...>
Date: 2010-04-21T21:59:17+09:00
Subject: [ruby-core:29689] Re: [Bug #3104](Closed) Random: seeding issues

2010/4/21 Yusuke Endoh <redmine@ruby-lang.org>:

>> 1) Seeding sometimes ignores the high bit of seed data.
>>
>>    Random.new((1<<64)-1).rand == Random.new((1 << 65) -1).rand
>>     # => true, should be false
>
> I really agree that this is uncool.

> Incidentally, I prefer removing MSB to current implementation.

I guess it is worse in the sense of the reporter.

Probably it causes
Random.new(2**32).rand ==
Random.new(2**33).rand ==
Random.new(2**34).rand ==
...
Random.new(2**63).rand.
-- 
Tanaka Akira