Why does my compiler say invalid syntax then highlight...?

[7stud]

On Mar 10, 9:44 pm, Nathan Pinno <MadComputer... at gmail.com> wrote:
> Why does my compiler say invalid syntax and then highlight the
> quotation marks in the following code:
>
> # This program is to find primes.
> primes = []
> import math
> import gmpy
> while 1:
>     run = int(raw_input("Do you want to calculate primes? 1 = yes and
> 2 = no. "))
>     if run == 1:
>         y = int(raw_input("What number do you want to use as the final
> number to calculate with? "))
>         x = int(raw_input("What number do you want to start
> calculating primes from? "))
>         while x < 2:
>             print "Number must be at least 2 for math reasons."
>         else:
>             while x < y:
>                 prime = math.cos(gmpy.pi(0) * gmpy.fac((x-1)) / x)
>                 if prime < 0:
>                     primes.append(x)
>                 else:
>                     print x " is not prime. " # highlights the final "
> here
>                 x = x + 1
>             print primes
>     elif run == 2:
>         break
>     else:
>         print "Sorry, not a choice. Please enter your choice again."
> print "Goodbye."
>
> How do I fix such an invalid syntax?
>
> TIA,
> Nathan Pinno

Rather, try running this:

print 10 "Hello world."