The number 204 is unprimeable because no single digit can be changed to make it prime. In contrast, the number 207 is not unprimeable because changing the first digit to 0, 1, 3, 6, or 9 or the second digit to 2, 5, or 7 would make it prime.
Write a function to determine whether the input number is unprimeable.
Solution Stats
Problem Comments
Solution Comments
Show comments
Loading...
Problem Recent Solvers16
Suggested Problems
-
Extract leading non-zero digit
2246 Solvers
-
Matrix with different incremental runs
131 Solvers
-
Implement a bubble sort technique and output the number of swaps required
387 Solvers
-
7990 Solvers
-
754 Solvers
More from this Author322
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
