Primes with digital product = 5.

Terms

a(0) =5a(1) =151a(2) =1151a(3) =1511a(4) =511111a(5) =1111151a(6) =115111111a(7) =1111115111a(8) =1115111111a(9) =1151111111a(10) =111111111511a(11) =111511111111