5 lines
174 B
Text
5 lines
174 B
Text
def semiprime(n)
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`factor #{n}`.split(' ').size == 3
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end
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n = 0xffffffffffffffff_u64 # 2**64 - 1 = 18446744073709551615
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(n-50..n).each { |n| puts "#{n} -> #{semiprime(n)}" }
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