7 lines
149 B
Ruby
7 lines
149 B
Ruby
require 'openssl'
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(1..10).each do |n|
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pow = 2 ** (2 ** n)
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print "#{n}:\t"
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puts (1..).step(2).detect{|k| OpenSSL::BN.new(pow-k).prime?}
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end
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