K Sengupta Messages 113 Reaction score 0 Thread starter Nov 30, 2009 #1 Determine all possible even perfect number(s) C such that each of C-1 and C+1 is a prime number.
Mentallic Homework Helper Messages 3,802 Reaction score 95 Nov 30, 2009 #2 Is it even possible to find ALL of these such numbers when only 47 perfect numbers are known? Anyway, I say 6. That is all
Is it even possible to find ALL of these such numbers when only 47 perfect numbers are known? Anyway, I say 6. That is all
chronon Messages 500 Reaction score 0 Nov 30, 2009 #3 From http://en.wikipedia.org/wiki/Perfect_number Even perfect numbers (except 6) give remainder 1 when divided by 9
From http://en.wikipedia.org/wiki/Perfect_number Even perfect numbers (except 6) give remainder 1 when divided by 9