# Getting the Proper Reply from ChatGPT – O’Reilly

A few days in the past, I used to be occupied with what you wanted to know to make use of ChatGPT (or Bing/Sydney, or any related service). It’s simple to ask it questions, however everyone knows that these giant language fashions incessantly generate false solutions. Which raises the query: If I ask ChatGPT one thing, how a lot do I have to know to find out whether or not the reply is appropriate?

So I did a fast experiment. As a brief programming venture, plenty of years in the past I made a listing of all of the prime numbers lower than 100 million. I used this record to create a 16-digit quantity that was the product of two 8-digit primes (99999787 occasions 99999821 is 9999960800038127). I then requested ChatGPT whether or not this quantity was prime, and the way it decided whether or not the quantity was prime.

## Be taught quicker. Dig deeper. See farther.

ChatGPT accurately answered that this quantity was not prime. That is considerably shocking as a result of, in case you’ve learn a lot about ChatGPT, you already know that math isn’t certainly one of its sturdy factors. (There’s most likely an enormous record of prime numbers someplace in its coaching set.) Nonetheless, its reasoning was incorrect–and that’s much more fascinating. ChatGPT gave me a bunch of Python code that carried out the Miller-Rabin primality check, and stated that my quantity was divisible by 29. The code as given had a few fundamental syntactic errors–however that wasn’t the one downside. First, 9999960800038127 isn’t divisible by 29 (I’ll allow you to show this to your self). After fixing the apparent errors, the Python code seemed like an accurate implementation of Miller-Rabin–however the quantity that Miller-Rabin outputs isn’t an element, it’s a “witness” that attests to the actual fact the quantity you’re testing isn’t prime. The quantity it outputs additionally isn’t 29. So ChatGPT didn’t really run this system; not shocking, many commentators have famous that ChatGPT doesn’t run the code that it writes. It additionally misunderstood what the algorithm does and what its output means, and that’s a extra severe error.

I then requested it to rethink the rationale for its earlier reply, and received a really well mannered apology for being incorrect, along with a special Python program. This program was appropriate from the beginning. It was a brute-force primality check that attempted every integer (each odd and even!) smaller than the sq. root of the quantity below check. Neither elegant nor performant, however appropriate. However once more, as a result of ChatGPT doesn’t really run this system, it gave me a brand new record of “prime elements”–none of which have been appropriate. Apparently, it included its anticipated (and incorrect) output within the code:

`n = 9999960800038127`
`elements = factorize(n)`
`print(elements) # prints [193, 518401, 3215031751]`

I’m not claiming that ChatGPT is ineffective–removed from it. It’s good at suggesting methods to unravel an issue, and may lead you to the fitting resolution, whether or not or not it provides you an accurate reply. Miller-Rabin is fascinating; I knew it existed, however wouldn’t have bothered to look it up if I wasn’t prompted. (That’s a pleasant irony: I used to be successfully prompted by ChatGPT.)

Getting again to the unique query: ChatGPT is nice at offering “solutions” to questions, but when that you must know that a solution is appropriate, it’s essential to both be able to fixing the issue your self, or doing the analysis you’d want to unravel that downside. That’s most likely a win, however it’s a must to be cautious. Don’t put ChatGPT in conditions the place correctness is a matter until you’re prepared and capable of do the arduous work your self.

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