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Right Perfect Prime Numbers
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2008-05-27, 15:45
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R. Gerbicz
"Robert Gerbicz"
Oct 2005
Hungary
5AE
_{16}
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Quote:
Originally Posted by
Housemouse
If P is an even perfect number greater than 6, P-1 is always composite divisible by nine. Is it known which perfect numbers are prime for P+1?
http://www.research.att.com/~njas/sequences/A061644
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