Smallest prime whose product of digits is an n-th power.

Terms

a(0) =2a(1) =19a(2) =139a(3) =199a(4) =1399a(5) =881a(6) =4481a(7) =18481a(8) =48281a(9) =48481a(10) =228881a(11) =284881a(12) =828881a(13) =884881a(14) =4448881a(15) =4848881a(16) =18848881a(17) =24888881a(18) =48888841a(19) =88884881a(20) =188888881a(21) =888828881a(22) =848888881a(23) =12888884881a(24) =8888882881a(25) =18848888881a(26) =28888884881