login
A155054
Primes p such that (number of prime digits of prime(p)) < (number of nonprime digits of prime(p)).
0
5, 13, 29, 41, 43, 47, 53, 79, 83, 89, 97, 109, 113, 127, 149, 157, 163, 167, 173, 179, 181, 193, 197, 223, 229, 233, 239, 257, 263, 271, 283, 293, 313, 317, 379, 421, 431, 433, 443, 449, 487, 541, 563, 601, 607, 617, 631, 647, 661, 691, 719, 761, 773, 797
OFFSET
1,1
COMMENTS
Prime digits are 2, 3, 5, 7, nonprime digits are 0, 1, 4, 6, 8, 9.
MATHEMATICA
okQ[n_]:=Module[{idn=IntegerDigits[Prime[n]]}, Count[idn, _?PrimeQ]< Length[idn]/2]; Select[Prime[Range[200]], okQ] (* Harvey P. Dale, Apr 20 2011 *)
CROSSREFS
Sequence in context: A216822 A217466 A078598 * A158756 A185086 A277701
KEYWORD
nonn,base,less
AUTHOR
EXTENSIONS
Corrected (277, 419 removed) by R. J. Mathar, May 05 2010
STATUS
approved