Palindromic primes: Difference between revisions
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=={{header|Factor}}==
===Simple===
A simple solution that suffices for the task:
{{works with|Factor|0.99 2021-02-05}}
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===Fast===
A much more efficient solution that generates palindromic numbers directly and filters primes from them:
{{works with|Factor|0.99 2021-02-05}}
<lang factor>USING: io kernel lists lists.lazy math math.functions
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