11 lines
289 B
Text
11 lines
289 B
Text
func cuban_primes(n) {
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1..Inf -> lazy.map {|k| 3*k*(k+1) + 1 }\
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.grep{ .is_prime }\
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.first(n)
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}
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cuban_primes(200).slices(10).each {
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say .map { "%9s" % .commify }.join(' ')
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}
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say ("\n100,000th cuban prime is: ", cuban_primes(1e5).last.commify)
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