Problem 45767. Prime number check (★★)
One way to see if a number x is prime is to compute the remainders obtained when dividing x by all integers from 2 to √(x). If x is prime, then all remainders will be non-zero.
For example, if x = 35 then √(x)=5.916, and the set of divisors from 2 to √(x) are [2 3 4 5]. The remainders obtained when dividing 35 by 2,3,4,5 are 1,2,3,0 respectively. Since one of the remainders is 0, the number x is not prime.
Write a function that will compute the remainders obtained when dividing x by all integers from 2 to √(x).
Avoid using for/while loops.
Solution Stats
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers45
Suggested Problems
-
Is this triangle right-angled?
5626 Solvers
-
503 Solvers
-
646 Solvers
-
300 Solvers
-
Matrix Generation from Vector Multiplication
84 Solvers
More from this Author52
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!