Find the 10001st prime

primes.rb

def evaluate_for_primes(primes, count)
	numbers = (primes[count-1]**2+1..primes[count]**2).to_a
	1.upto(count) {|c| numbers.select! {|number| number%primes[c] != 0}}
	primes.concat(numbers)
end

primes, count = [1, 2], 1
until primes.length > 10001 do
	evaluate_for_primes(primes, count)
	count += 1
end
p primes[10001]