Problem 64. The Goldbach Conjecture, Part 2

Created by Cody Team

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>The</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://en.wikipedia.org/wiki/Goldbach's_conjecture\"><w:r><w:t>Goldbach conjecture</w:t></w:r></w:hyperlink><w:r><w:t> asserts that every even integer greater than 2 can be expressed as the sum of two primes.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>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.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Example:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ Input  n = 10\n Output c is 2]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>because of the prime pairs [3 7] and [5 5].</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ Input  n = 50\n Output c is 4]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>because of [3 47], [7 43], [13 37], and [19 31].</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

2348 Solutions
1193 Solvers

Last Solution submitted on Oct 15, 2020

Last 200 Solutions

Problem Comments

3 Comments

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

Ahmed Nazir on 1 Oct 2020 at 6:09

%%%%%%%%%%%%%%%%%%%%%%

Useful Function => primes, isprime

Solution:
https://github.com/AhmedNazir/MatlabCody/blob/master/goldbach2.m

Problem Recent Solvers1193

Problem Tags

primes

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 64. The Goldbach Conjecture, Part 2

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers1193

Suggested Problems

More from this Author95

Problem Tags

Community Treasure Hunt

Problem 64. The Goldbach Conjecture, Part 2

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers1193

Suggested Problems

More from this Author95

Problem Tags

Community Treasure Hunt

Players