Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #20 Jan 24 2017 20:44:58
%S 3,7,37,43,47,73,79,97,337,347,349,373,379,397,433,439,443,449,479,
%T 499,733,739,743,773,797,937,947,977,997,3343,3347,3373,3433,3449,
%U 3499,3733,3739,3779,3793,3797,3943,3947,4337,4339,4349,4373,4397,4447,4493,4733
%N Primes that only use digits that survived in the movie 9: {3, 4, 7, 9}.
%C The Fibonacci prime 433494437 is in this sequence.
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/9_(2009_animated_film)">9 (2009 animated film)</a>
%F a(n) >> n^k, where k = log(10)/log(4) = 1.660964.... - _Charles R Greathouse IV_, Jan 24 2017
%o (PARI) is(n)=#setunion(Set(digits(n)), [3,4,7,9])==4 && isprime(n) \\ _Charles R Greathouse IV_, Jan 24 2017
%Y Cf. A091633.
%K base,nonn
%O 1,1
%A _Bobby Jacobs_, Jan 24 2017