Odd squarefree semiprimes: Difference between revisions
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(→{{header|Ruby}}: more simple) |
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res = (1..1000).step(2).select do |n| |
res = (1..1000).step(2).select do |n| |
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pd = n.prime_division |
pd = n.prime_division |
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pd.map(&:last)==[1,1] |
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end |
end |
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