64 bit - How do you know if you can add 64 bit version of Lubuntu?

NOOB alert-

I have an HP/Compaq nc6120 laptop. I just added the 32 bit version of Lubuntu, however I wondered what would tell me if I could use the 64 bit version? Here are my PC Specs

• Computer:

  
  
  
  
  
  • Processor : Intel(R) Pentium(R) M processor 1.86GHz
  
  
  • Memory : 2056MB (441MB used)
  
  
  • Operating System : Ubuntu 13.10
  
  



• Display:

  
  
  
  
  
  
  • Resolution : 1400x1050 pixels
  
  

I understand that PCs older than 2007 do not likely use 64 bit, but I'm not sure how old this laptop is.

Thanks for your help
Mike

Intel Pentium M is a family of 32-bit processors, see Pentium M on Wikipedia.

So you cannot install Lubuntu 64-bit.