Truncatable Primes - MATLAB Cody - MATLAB Central

Problem 52313. Truncatable Primes

Difficulty:
(179)
Rate
A truncatable prime is a leading digit is successively removed, then all resulting numbers are prime.
When given a number, Return as per the precedence given
1) 0 - if a number is not a prime or not a truncatable prime.
2) 5 - if a number is left-and-right-truncatable prime. E.g. - 127 => 2
3) 9 - if a number is left as well as right truncatable prime but not a left-and-right-truncatable prime.
For e.g - 313 => 13 (left) & 31 (right) but not 1 (left-and-right both)
4) 3 - if a number is (exclusive) left-truncatable prime. E.g - 17 => 7
7 - if a number is (exclusive) right-truncatable prime. E.g. - 29 => 2
Note - String functions are not allowed!
Solve

Solution Stats

83.33% Correct | 16.67% Incorrect
Last Solution submitted on May 21, 2022

Problem Comments

Solution Comments

Show comments
Registration Now Open for MathWorks AUTOMOTIVE CONFERENCE 2025
...
Hello Community, We're excited to announce that registration is now open for the...

Problem Recent Solvers5

Suggested Problems

More from this Author31

Problem Tags

primes

Community Treasure Hunt

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

Start Hunting!
Go to top of page