Use modular arithmetic: $ 2^3 = 8 \equiv 1 \mod 7 $, so $ 2^3 \equiv 1 \Rightarrow 2^{10} = (2^3)^3 \cdot 2 = 1^3 \cdot 2 = 2 \mod 7 $.

Wed, 06 May 2026 02:32:15 +0000

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