Consider three consecutive integers x,
, and
. When is the number
prime? For example, if
or
, then the results are 17 and 37, both prime, but if
or
, the results are 65 and 145, which are composite.
Write a function to list prime numbers less than or equal to the input that can be written in the form
. The function should also return the values of x (i.e., the smallest number of the triple) leading to the primes.
Optional: Prove that the number of primes of this form is infinite.
Solution Stats
Solution Comments
Show comments
Loading...
Problem Recent Solvers12
Suggested Problems
-
17443 Solvers
-
13671 Solvers
-
Matrix with different incremental runs
131 Solvers
-
209 Solvers
-
Is this is a Tic Tac Toe X Win?
536 Solvers
More from this Author325
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!