Problem 64. The Goldbach Conjecture, Part 2

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The Goldbach conjecture asserts that every even integer greater than 2 can be expressed as the sum of two primes.

Given the even integer n, return c, the number of different ways two primes can be added to result in n. Only count a pair once; the order is unimportant.

Example:

 Input  n = 10
 Output c is 2

because of the prime pairs [3 7] and [5 5].

 Input  n = 50
 Output c is 4

because of [3 47], [7 43], [13 37], and [19 31].

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Last Solution submitted on Feb 25, 2025

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3 Comments

Dima Panna on 1 Jun 2019

For some reason the 'nthprime' function is not recognized, however it works for me in my desktop MATLAB.

Asif Newaz on 1 Nov 2019

@Dima Panna 'nthprime' uses symbolic math toolbox which is not supported in cody

Faisal deshpande on 28 Aug 2021

I have used same solution approach as in goldbach conjecture part 1.

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Problem 64. The Goldbach Conjecture, Part 2

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Problem 64. The Goldbach Conjecture, Part 2

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Last 200 Solutions

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Problem Recent Solvers2367

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