MathDB
Hiperprime....

Source: Moldova Junior TST 2008 Day 3 Problem 4

April 11, 2008
combinatorics proposedcombinatorics

Problem Statement

Natural nonzero numder, which consists of m m digits, is called hiperprime, if its any segment, which consists 1,2,...,m 1,2,...,m digits is prime (for example 53 53 is hiperprime, because numbers 53,3,5 53,3,5 are prime). Find all hiperprime numbers.
Back to ProblemsView on AoPS