Let n be the representation of a natural number in a non-unary base. Is it a prefix of the representation of a prime number over the same base?
For example: in decimal, the answer for 10 is yes, because 103 is prime. Is this true for every number?
EDIT: As Henning Makholm has pointed out, this question has been asked before: Proof that there are infinitely many prime numbers starting with a given digit string