Nice primes: Difference between revisions
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(Created page with "{{task}} ::# Take an integer n, greater than zero. ::# sumn is sum of n's digits ::# If sumn's lenght greater than 1 repeat the (2) for n = sumn ::#  ...") |
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1 + 6 = 7 (prime) |
1 + 6 = 7 (prime) |
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</pre> |
</pre> |
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=={{header|Factor}}== |
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<lang factor>USING: math math.primes prettyprint sequences ; |
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: digital-root ( m -- n ) 1 - 9 mod 1 + ; |
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500 1000 primes-between [ digital-root prime? ] filter .</lang> |
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{{out}} |
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<pre style="height:10em"> |
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V{ |
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509 |
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547 |
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563 |
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569 |
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587 |
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599 |
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601 |
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617 |
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619 |
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641 |
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653 |
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659 |
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673 |
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677 |
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691 |
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709 |
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727 |
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743 |
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761 |
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797 |
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821 |
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839 |
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853 |
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857 |
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887 |
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907 |
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911 |
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929 |
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941 |
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947 |
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977 |
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983 |
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997 |
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}</pre> |
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=={{header|Ring}}== |
=={{header|Ring}}== |
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