This present article is in part a response to the challenge to find similar results
using other primes of a small digital sum. Still relying on carry-free multiplication,
we shall deal with primes P for which S(P) 8 and construct the Smith multiples
mP with the help of prime numbers whose digits are composed of zeros and ones.
Along this line, we acknowledge an early work [3] in which Smith multiples
of a prime repunit are studied. (Such multipliers are listed on page A104167 at
OEIS, the On-Line Encyclopedia of Integer Sequences.) Nevertheless, our results
do not overlap with such a case since we are to find one Smith multiplier that
works for a whole class of primes given by their digital sum.