Primes having only {0, 5, 7} as digits.

Terms

a(0) =5a(1) =7a(2) =557a(3) =577a(4) =757a(5) =5077a(6) =5507a(7) =5557a(8) =7057a(9) =7507a(10) =7577a(11) =7757a(12) =50077a(13) =50707a(14) =50777a(15) =55057a(16) =57077a(17) =57557a(18) =70507a(19) =75557a(20) =75577a(21) =75707a(22) =77557a(23) =500057a(24) =500777a(25) =505777a(26) =507077a(27) =507557a(28) =507757a(29) =550007