A090725 Primes whose representation in base 16 has no alphabetic characters.

2, 3, 5, 7, 17, 19, 23, 37, 41, 53, 67, 71, 73, 83, 89, 97, 101, 103, 113, 131, 137, 149, 151, 257, 263, 277, 281, 293, 307, 311, 313, 337, 353, 359, 373, 389, 401, 409, 521, 547, 563, 569, 577, 593, 599, 601, 613, 617, 631, 641, 643, 647, 659, 661, 769, 773