Primes having only {5, 7, 8, 9} as digits.

Terms

a(0) =5a(1) =7a(2) =59a(3) =79a(4) =89a(5) =97a(6) =557a(7) =577a(8) =587a(9) =599a(10) =757a(11) =787a(12) =797a(13) =857a(14) =859a(15) =877a(16) =887a(17) =977a(18) =997a(19) =5557a(20) =5779a(21) =5857a(22) =5879a(23) =5897a(24) =5987a(25) =7559a(26) =7577a(27) =7589a(28) =7757a(29) =7759