I searched so many articles about Bloch-Kato $p$-selmer Groups defined by $p$-adic representation but it seems that $p$ is not necessary to be odd. Hence, I am wondering if it is worth considering Bloch-Kato 2-selmer Groups (2-primary) or Bloch-Kato conjecture for p=2 (2 part of Bloch-Kato Conjecture).

Thank you very much!

I searched so many articles about Bloch-Kato $p$-selmer Groups defined by $p$-adic representation but it seems that $p$ is not necessary to be odd. Hence, I am wondering if it is worth considering Bloch-Kato 2-selmer Groups (2-primary) or Bloch-Kato conjecture for $p=2$ (2 part of Bloch-Kato Conjecture). Besides, there are some papers avoid considering $p=2$ and prove the theorem under the condition $p$ is odd prime.

Thank you very much!