Primes having only {4, 8, 9} as digits.

Terms

a(0) =89a(1) =449a(2) =499a(3) =4889a(4) =4999a(5) =8849a(6) =8999a(7) =9949a(8) =44449a(9) =48449a(10) =48889a(11) =48989a(12) =49499a(13) =49999a(14) =84449a(15) =84499a(16) =88499a(17) =89449a(18) =89849a(19) =89899a(20) =89989a(21) =94849a(22) =94889a(23) =94949a(24) =94999a(25) =98849a(26) =98899a(27) =98999a(28) =99989a(29) =444449