Primitive roots for Pjateckii-Sapiro primes

For any non-integral positive real number c, any sequence (left peependicular n(c) right perpndicular)(n) is called a Pjateckii-Sapiro sequence. Given a real number c in the interval (1, 12/11), it is known that the number of primes in this sequence up to x has an asymptotic formula. We would like to use the techniques of Gupta and Murty to study Artin's problems for such primes. We will prove that even though the set of Pjateckii-Sapiro primes is of density zero for a fixed c, one can show that there exist natural numbers which are primitive roots for infinitely many Pjateckii-Sapiro primes for any fixed c in the interval (1, root 77/7 - 1/4) 7