Diffie-Hellman algorithm, what should be the key length?

Question

Encryption

I implement the Diffie-Hellman algorithm, the common key is generated and matches, the length of the key itself is 3 bits. For example, the key turned out to be 343. Then I will encrypt everything with AES - 256. How reliable is this key length? Is there something (document, article, whatever) where it is described. Google didn't help. Such an algorithm is used (used, now rsa is used) in https - what is the key length there (at least approximately)?

Answer 1

343 is no longer three bits. The three bits are numbers from 0 to 7.
From the wiki:
Accordingly, the key will be of the order of 10 ³⁰⁰ or 2 ¹⁰⁰⁰ .