Number and sum of prime factors of a number

  • Context: Undergrad 
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    Factors Prime Sum
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Discussion Overview

The discussion revolves around the existence of a formula to determine the number of prime factors and their sum for a large number N, specifically without listing or factorizing N. Participants explore theoretical implications and potential consequences of such a formula.

Discussion Character

  • Exploratory, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant inquires about a formula that could yield the number of prime factors and their sum, referencing the τ(N) and σ(N) functions.
  • Another participant questions the implications of a hypothetical formula f(N) equating to 1, seeking clarification on its meaning.
  • A different viewpoint suggests that if such a formula existed, it could undermine internet security, which relies on the difficulty of prime factorization, as exemplified by the RSA Algorithm.
  • One participant notes that while there are formulas to determine if a number is prime, they do not extend to finding its factors.
  • Another participant comments that existing "formulas" for finding the nth prime are more symbolic representations of inefficient algorithms rather than practical solutions.

Areas of Agreement / Disagreement

Participants express differing views on the existence and implications of a formula for prime factors, with no consensus reached on the matter.

Contextual Notes

Participants acknowledge the limitations of current methods for determining prime factors and the implications of a potential formula without resolving the mathematical complexities involved.

suchith
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Given a large number N, do we have any formula to find the number of prime factors and their sum like τ(N) and σ(N) functions?

CONDITION: One should not list the factors of N or is not allowed to factorize N since afterwards it would be just a matter of counting and addition
 
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If such a formula ## f(N) ## exists, what would ## f(N) = 1 ## mean?
 
I believe if such a formula does exist then the entire internet would be vulnerable. The internet is secure because of prime number factorisation. See RSA Algorithm

There is a formula to find if a number is prime or not, but not the factors.

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That actually looks like a "formula" to find the ## n ##th prime, but such "formulas" are really just symbolic descriptions of (very ineffecient) algorithms and of no practical importance.
 

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