(Technical University of Liberec, ) Křížek, Michal; Jednota českých matematiků a fyziků
A new class of prime numbers - Baťa primes - is introduced. A positive integer is called a Baťa prime of class k if it ends with at least k 9s. We prove that for any positive integer k there exist infinitely many Baťa primes of class k. Some generalizations of this statement are given as well.