Fibonacci Primes

fibprime.rb

#!/usr/bin/env ruby
$path="/ilab/users/bilalq/.scripts/primeList.txt"

class Prime
  def initialize
    @primes=File.open($path).collect do |num|
      num.to_i
    end
    @count = @primes.size
  end

  def prime? n
    result = true
    limit = Math.sqrt(n)
    @primes.each do |curr|
      if (n%curr == 0)
        result = false
        break
      end
      if (curr > limit)
        result = true
        break
      end
    end
    result
  end

  def nextp
    i = @primes.last + 2
    until (prime? i)
      i+=2
    end
    @primes.push(i)
  end

  def nthPrime n
    unless (n<1)
      until (@primes.length >= n)
        nextp	
      end
      @primes[n-1]
    end
  end

  def getSub
    if (@count == @primes.size)
      -1
    else
      subPrimes = @primes[@count..@primes.size-1]
      subPrimes
    end
  end
end

#if (ARGV[0] == nil)
#$path+="primeList.txt"
#test = Prime.new
#while (true)
#puts "Enter a number and get back nth prime:"
#num = gets.to_i
#break unless num > 0
#answer = test.nthPrime(num);
#puts answer
#end
#exit
#elsif (ARGV[0].to_s == "-h")
#puts "nth Prime Calculator"
#puts "To use, enter a single value as an argument."
#puts "Alternatively, you can run with no arguments for extended use."
#exit
#else
#$path += ( ARGV[0].to_i >= 1000000 ? "primeLong.txt" : "primeList.txt" )
#test = Prime.new
#answer = test.nthPrime(ARGV[0].to_i)
#puts answer
#end

#extras = test.getSub
#unless (extras == -1)
#f2 = File.open($path,"a") 
#extras.each do |curr|
#f2.puts curr.to_s
#end
#end
#

test = Prime.new

fibPrimeIndex = 1
lastFib = 1
currFib = 2
until fibPrimeIndex == 12
  temp = currFib
  currFib += lastFib
  lastFib = temp
  if test.prime?(currFib)
    puts currFib
  end
end