|
1000th item of this sequence is 3273527
</pre>
=={{header|AWK}}==
<lang AWK>
# syntax: GAWK -f SMARANDACHE_PRIME-DIGITAL_SEQUENCE.AWK
BEGIN {
limit = 25
printf("1-%d:",limit)
while (1) {
if (is_prime(++n)) {
if (all_digits_prime(n) == 1) {
if (++count <= limit) {
printf(" %d",n)
}
if (count == 100) {
printf("\n%d: %d\n",count,n)
break
}
}
}
}
exit(0)
}
function all_digits_prime(n, i) {
for (i=1; i<=length(n); i++) {
if (!is_prime(substr(n,i,1))) {
return(0)
}
}
return(1)
}
function is_prime(x, i) {
if (x <= 1) {
return(0)
}
for (i=2; i<=int(sqrt(x)); i++) {
if (x % i == 0) {
return(0)
}
}
return(1)
}
</lang>
{{out}}
<pre>
1-25: 2 3 5 7 23 37 53 73 223 227 233 257 277 337 353 373 523 557 577 727 733 757 773 2237 2273
100: 33223
</pre>
=={{header|Factor}}==
===Naive===
|