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
-
Replace NaNs with the number that appears to its left in the row.
3064 Solvers
-
Project Euler: Problem 1, Multiples of 3 and 5
3670 Solvers
-
Construct a string from letters and counts
146 Solvers
-
983 Solvers
-
Replace Nonzero Numbers with 1
444 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!
