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photomattmills/primenumber.rb

Created November 27, 2010 18:07
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class for testing primes.
Raw
primenumber.rb
class PrimeNumber
def self.is_prime(n)
(2..Math.sqrt(n).to_i).each { |test| return false if n.modulo(test) == 0 }
return true
end
end
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