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
-
14059 Solvers
-
Find state names that start with the letter N
1430 Solvers
-
Back to basics 9 - Indexed References
459 Solvers
-
Replace all zeros and NaNs in a matrix with the string 'error'
103 Solvers
-
Replace Nonzero Numbers with 1
442 Solvers
More from this Author321
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
