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naxmefy/unique-prime-factors.rb

Created April 24, 2021 22:53
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unique prime factors in range from a to b
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unique-prime-factors.rb
require'prime'
gets
$<.map{|s|p (s.to_i..s[/ .+/].to_i).count{|n|n>0&&n.prime_division[1]}}
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