A106100 Primes with maximal digit = 2.

2, 211, 1021, 1201, 2011, 2111, 2221, 10211, 12011, 12101, 12211, 20011, 20021, 20101, 20201, 21001, 21011, 21101, 21121, 21211, 21221, 22111, 101021, 101221, 102001, 102101, 102121, 110221, 111121, 111211, 112111, 112121, 120011, 120121

Offset

1,1

Comments

Subsequence of A036953. Prime numbers p such that A209928(p) = 2. Complement of A221698 with respect to A221697. [Jaroslav Krizek, Jan 22 2013]

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

N:= 6: # to get all terms of up to N digits
M2:= {1}; M1:= {1}:
for d from 1 to N-1 do
  M2:= map(t -> (t, t+10^d, t+2*10^d), M2);
  M1:= map(t -> (t, t+10^d), M1);
od:
sort(convert({2} union select(isprime, M2 minus M1), list)); # Robert Israel, Jun 19 2016

Mathematica

Select[Prime[Range[10000]], Max[IntegerDigits[ # ]]==2&]

Prog

(PARI) isok(p) = isprime(p) && (vecmax(digits(p)) == 2); \\ Michel Marcus, Jan 02 2019

Crossrefs

Cf. A106093, A106094, A106095, A106096, A106097, A106098, A106099.

Sequence in context: A050445 A167833 A167838 * A167839 A107612 A068814

Adjacent sequences: A106097 A106098 A106099 * A106101 A106102 A106103

Keyword

nonn,base

Author

Zak Seidov, May 07 2005

Extensions

More terms from Rick L. Shepherd, May 22 2005

Status

approved