Primes which divide a term of A073935.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =17a(5) =19a(6) =43a(7) =101a(8) =163a(9) =257a(10) =487a(11) =1459a(12) =14407a(13) =26407a(14) =39367a(15) =62501a(16) =65537a(17) =77659a(18) =1020101a(19) =1336337a(20) =86093443a(21) =242121643a(22) =258280327a(23) =3103616899