Numbers k such that 171*2^k-1 is prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =10a(4) =25a(5) =29a(6) =39a(7) =73a(8) =103a(9) =109a(10) =123a(11) =198a(12) =378a(13) =434a(14) =825a(15) =925a(16) =1265a(17) =1802a(18) =2134a(19) =2199a(20) =2629a(21) =3154a(22) =3490a(23) =4093a(24) =4814a(25) =5490a(26) =7029a(27) =9074a(28) =9298a(29) =10249