Primes of form 6k+1 that use only digits 2 and 3.

Terms

a(0) =223a(1) =32233a(2) =32323a(3) =33223a(4) =232333a(5) =233323a(6) =323233a(7) =2332333a(8) =2333323a(9) =3222223a(10) =3223333a(11) =3233323a(12) =3332233a(13) =22223323a(14) =22232233a(15) =22232323a(16) =23222233a(17) =23223223a(18) =23322223a(19) =32322223a(20) =33222223a(21) =223323223a(22) =223333333a(23) =232232233a(24) =232233223