181 questions linked to/from How do I compute $a^b\,\bmod c$ by hand?
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Find the remainder when $10^{20^{30}}$ is divided by $23$ [duplicate]

Find the remainder when $10^{20^{30}}$ is divided by $23$ I guess this question is fairly simple, but I just want to make sure I'm on the right track. My answer is shown below. If it is incorrect, ...