Numbers whose binary and ternary digit sums are prime: Difference between revisions

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=={{header|Ruby}}==
<syntaxhighlight lang="ruby">require 'prime'
require 'prime'
 
p (1..200).select{|n| [2, 3].all?{|base| n.digits(base).sum.prime?} }</syntaxhighlight>
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[5, 6, 7, 10, 11, 12, 13, 17, 18, 19, 21, 25, 28, 31, 33, 35, 36, 37, 41, 47, 49, 55, 59, 61, 65, 67, 69, 73, 79, 82, 84, 87, 91, 93, 97, 103, 107, 109, 115, 117, 121, 127, 129, 131, 133, 137, 143, 145, 151, 155, 157, 162, 167, 171, 173, 179, 181, 185, 191, 193, 199]
</pre>
 
=={{header|Sidef}}==
<syntaxhighlight lang="ruby">1..^200 -> grep {|n| [2,3].all { n.sumdigits(_).is_prime } }</syntaxhighlight>
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