Object
Internal use. An implementation of Eratosthenes' sieve
# File prime.rb, line 520 def initialize @primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101] # @max_checked must be an even number @max_checked = @primes.last + 1 end
# File prime.rb, line 526 def get_nth_prime(n) compute_primes while @primes.size <= n @primes[n] end
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