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Add optimized binary extended gcd algorithm #38

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@unseddd unseddd commented Jan 22, 2021

Optimized to use cheap shifts and adds rather than multiplications and
divisions for finding the greated common divisor and Bezout coefficients.

Optimized to use cheap shifts and adds rather than multiplications and
divisions for finding the greated common divisor and Bezout coefficients.
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unseddd commented Jan 22, 2021

Much appreciation to @cuviper for their help/discussion about the impl on Zulip.

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}
extended_gcd(&self, other)
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Why doesn't this try to use the binary method?

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