Larger of a pair of consecutive primes having only prime digits.

Terms

a(0) =3a(1) =5a(2) =7a(3) =227a(4) =733a(5) =3257a(6) =3733a(7) =5237a(8) =5333a(9) =7577a(10) =7727a(11) =7757a(12) =22277a(13) =23333a(14) =25537a(15) =27737a(16) =32237a(17) =32327a(18) =32537a(19) =35327a(20) =35537a(21) =37273a(22) =37277a(23) =52237a(24) =52733a(25) =53327a(26) =53353a(27) =53777a(28) =55337a(29) =72227