Perfect Numbers

  • #1

Main Question or Discussion Point

Show that ----> if n is even perfect number than n [tex]\equiv[/tex]6(mod10) or n[tex]\equiv[/tex]8(mod10)
 

Answers and Replies

  • #2
CRGreathouse
Science Advisor
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Do you know the Euclid-Euler form?
 
  • #3
2^(p-1) *(2^p-1) formula i think you have said, i know this formula but i haven't get the result with this.
 
Last edited:
  • #4
I can't believe to myself i think i proved :)
http://www.loadtr.com/465992-mmmmm.htm [Broken]
 
Last edited by a moderator:
  • #5
446
1
I can't believe to myself i think i proved :)
http://www.loadtr.com/465992-mmmmm.htm [Broken]
yea. it should be it
 
Last edited by a moderator:
  • #6
it is important point of exponential of 4 is congruence 4 or 6 mod 10, i have missed it i think :)
 

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