= Addition-chain exponentiation
{wiki=Addition-chain_exponentiation}
Addition-chain exponentiation is an efficient algorithm used for computing large powers of a number, particularly in the context of modular arithmetic, common in fields such as cryptography. The main idea behind addition-chain exponentiation is to represent the exponent as a sum of earlier results obtained from multiplying the base by itself and applying the operations of addition and multiplication in a structured way.
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