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anonymous
 4 years ago
What is the third perfect number? Please help me understand how it works. thnx
anonymous
 4 years ago
What is the third perfect number? Please help me understand how it works. thnx

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Hero
 4 years ago
Best ResponseYou've already chosen the best response.01^2 = 1 2^2 = 4 3^2 = 9 The third perfect number is 9? Did you mean perfect SQUARES?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ohh, no, ummm, like the first number is 6, the second is 28, and idk what the third is...plus idk how to get the number

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Aperfect number is a positive integer that is equal to the sum of its proper positive divisors. Mathematically, \( \sigma_1(N)=2N \) \(\sigma_1() \) is the divisor function ( http://en.wikipedia.org/wiki/Divisor_function) Here is the list of perfect numbers in OEIS: http://oeis.org/A000396

Hero
 4 years ago
Best ResponseYou've already chosen the best response.0And fool clearly wiki'd it

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0A year back I wrote a very optimized perfect number generator.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0whoa, did you code it all?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Unfortunately it's a part of an algorithm contest, so I can't share the code here. But I can give some hints if you want :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Hero, I don't really need to wike perfect numbers :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Yes please, any that are available :) I just started coding a few days ago and I'm working through the Python textbook. Just started my first more complex code (finding slope and yintercept)still very simple, but I'd appreciate it

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Okay first there are no odd perfect numbers (this is not proven yet) so you can clearly ignore the odd numbers.

Hero
 4 years ago
Best ResponseYou've already chosen the best response.0Why am I just now hearing about perfect numbers? In what course do you usually learn about them?

Hero
 4 years ago
Best ResponseYou've already chosen the best response.014yamaka, what course are you currently taking?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Now, you need to have a very fast \( \sigma_1(N) \) for that you need to have a fast optimized prime generator. This is actually deep I have used Miller Rabin algorithm.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@Hero: Elementary Number theory.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.014yamaka, I would probably advice you to be satisfied with typical bruteforce at this stage :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0*This is actually deep, I have used Miller Rabin algorithm + sieve.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0wow, ok, I gotta read up on this Miller Rabin algorithm. and sieve. Thanks for the explanation. Both of you :)

Hero
 4 years ago
Best ResponseYou've already chosen the best response.0I didn't provide anything, lol FFM provided everything
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