Palindromic primes: Difference between revisions
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=={{header|Ruby}}==
<syntaxhighlight lang="ruby">require 'prime'
p Prime.each(1000).select{|pr| pr.digits == pr.digits.reverse}</syntaxhighlight>
{{out}}
<pre>[2, 3, 5, 7, 11, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929]
</pre>
=={{header|Sidef}}==
<syntaxhighlight lang="ruby">func palindromic_primes(upto, base = 10) {
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