Science Fair Project Encyclopedia
Weird number
In mathematics, a weird number is a natural number that is abundant but not semiperfect. The first few weird numbers are 70, 836, 4030, 5830, 7192, 7912, 9272, 10430, ... . It has been shown that an infinite number of weird numbers exist, and the sequence of weird numbers has also been proven to have positive Schnirelmann density.
As of this writing, no odd weird number has been found.
See also
External links
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details