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

Offset: 1

Author

Cino Hilliard, Jan 18 2004

Keywords

• base
• nonn

Comments

Subsequence of primes of A102489. - Michel Marcus, Mar 05 2016

Links

• Zak Seidov, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A102489.

Programs

Mathematica

Select[Prime[Range[400]], Max[IntegerDigits[#, 16]] < 10 & ] (* Zak Seidov, Mar 04 2016 *)

PARI

isok(n) = isprime(n) && (vecmax(digits(n, 16)) < 10); \\ Michel Marcus, Mar 05 2016

Extensions

Better definition from Omar E. Pol, Dec 24 2008