From: Dave B <redmine@...>
Date: 2009-03-04T01:40:20+09:00
Subject: [ruby-core:22651] [Bug #1243] 1 is prime

Issue #1243 has been updated by Dave B.


+    value = -value if value < 0  <--- NOT required ?
+    return false if value < 2

I think your negative guard is not required?

All negatives, 0 and 1 are non-prime, therefore all < 2 are non-prime.

http://en.wikipedia.org/wiki/Prime_number


daz


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