Problem 981. Find nearest prime number less than input number

Solution 840982

Submitted on 2 Mar 2016

This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

This solution is outdated. To rescore this solution, sign in.

eggart on 2 Mar 2016

IMHO 1 is not a prime, so that on input n=2 the correct answer should be [] and not 1.

Test	Status	Code Input and Output
1	Pass	n = 127; y_correct = 113; assert(isequal(minorprime(n),y_correct))
2	Pass	n = 125; y_correct = 113; assert(isequal(minorprime(n),y_correct))
3	Pass	n = 3; y_correct = 2; assert(isequal(minorprime(n),y_correct))
4	Fail	n = 2; y_correct = 1; assert(isequal(minorprime(n),y_correct)) Error using minorprime (line 2) Subscript indices must either be real positive integers or logicals.
5	Pass	n = 1328; y_correct = 1327; assert(isequal(minorprime(n),y_correct))
6	Pass	n = 5050109; y_correct = 5050099; assert(isequal(minorprime(n),y_correct))

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

Start Hunting!