First 9 prime Fibonacci number: Difference between revisions
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</pre>
=={{header|Ruby}}==
<syntaxhighlight lang="ruby">require 'prime'
prime_fibs = Enumerator.new do |y|
a, b = 1, 1
loop do
y << a if a.prime?
a, b = b, a + b
end
end
puts prime_fibs.take(9)</syntaxhighlight>
{{out}}
<pre>
[2, 3, 5, 13, 89, 233, 1597, 28657, 514229]
</pre>
=={{header|Sidef}}==
<syntaxhighlight lang="ruby">say 12.by { .fib.is_prime }.map { .fib }</syntaxhighlight>
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