Neighbour primes: Difference between revisions
→{{header|jq}}: efficiency
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Line 430:
end;
# (not actually used)
def is_neighbour_prime:
is_prime and ((. * next_prime) + 2 | is_prime);
# The task, implemented using only `next_prime` for efficiency
{p: 2}
| while (.p < 500;
(.p|next_prime) as $np
| .emit = false
| if (.p * $np) + 2 | is_prime
then .emit = .p
else .
end
| .p = $np )
| select(.emit).emit
</lang>
{{out}}
<pre>
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