1. The problem statement, all variables and given/known data Let F be a field with order 2^n. Prove that char (F) = 2. 2. Relevant equations 3. The attempt at a solution My reasoning is that since a field is an integral domain, its characteristic must be either 0 or prime. After that I get confused, because would the char (F) need to somehow be related to the order of the field? Is there some reasoning that since it must divide the order of the field (just spit balling) and it must be prime, that it could just be 2? I know this is by no means a proof, but I am having difficulty finding some strong ideas to finish this.