Primes having only {5, 6, 8, 9} as digits.

Terms

a(0) =5a(1) =59a(2) =89a(3) =569a(4) =599a(5) =659a(6) =859a(7) =5569a(8) =5659a(9) =5669a(10) =5689a(11) =5869a(12) =6569a(13) =6599a(14) =6659a(15) =6689a(16) =6869a(17) =6899a(18) =6959a(19) =8599a(20) =8669a(21) =8689a(22) =8699a(23) =8969a(24) =8999a(25) =9689a(26) =9859a(27) =55589a(28) =55889a(29) =56569