Problem 44384. Find the nearest prime number
Happy 5th birthday, Cody! Since 5 is a prime number, let's have some fun looking for other prime numbers.
Given a positive integer x, find the nearest prime number. Keep in mind that the nearest prime may be less than x.
Examples
nearestprime(5) = 5 nearestprime(36) = 37 nearestprime(200) = 199
NOTE: You may ignore cases in which two prime numbers are equally close to x. (e.g., x=12 --> 11 and 13 are both primes).
Solution Stats
Problem Comments
-
1 Comment
Tran Hiep Dinh
on 21 Mar 2019
Test case No. 5
x = 911;
y_correct = 911;
Should the nearest prime number for 911 have been 907?
Solution Comments
Show comments
Problem Recent Solvers632
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!