Problem B. 4761. (January 2016)
B. 4761. Let \(\displaystyle n\) be an integer greater than 3. Prove that if each digit occurs exactly once in the base-\(\displaystyle n\) representation of an integer then the number cannot be a prime.
Proposed by Z. Halasi, Csobánka
(4 pont)
Deadline expired on February 10, 2016.
Statistics:
122 students sent a solution. 4 points: 79 students. 3 points: 28 students. 2 points: 11 students. 1 point: 2 students. 0 point: 2 students.
Problems in Mathematics of KöMaL, January 2016