clean_chains.rb

require 'prime'

Prime.each_with_index.inject(0) do |sum, (number, index)|
  puts index + 1 if sum % number == 0
  sum += number
end

error.out

TypeError: Array can't be coerced into Fixnum
                % at org/jruby/RubyFixnum.java:634
           (root) at clean_chains.rb:4
             call at org/jruby/RubyProc.java:255
             each at /Users/sferik/.rbenv/versions/jruby-1.7.4/lib/ruby/1.9/prime.rb:287
             loop at org/jruby/RubyKernel.java:1489
             each at /Users/sferik/.rbenv/versions/jruby-1.7.4/lib/ruby/1.9/prime.rb:286
             each at /Users/sferik/.rbenv/versions/jruby-1.7.4/lib/ruby/1.9/prime.rb:149
         __send__ at org/jruby/RubyBasicObject.java:1703
             each at /Users/sferik/.rbenv/versions/jruby-1.7.4/lib/ruby/1.9/forwardable.rb:201
  each_with_index at org/jruby/RubyEnumerable.java:920
             each at org/jruby/RubyEnumerator.java:270
           inject at org/jruby/RubyEnumerable.java:815
           (root) at clean_chains.rb:3