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Prime numbers, diophantine equations, diophantine approximations, analytic or algebraic number theory, arithmetic geometry, Galois theory, transcendental number theory, continued fractions

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sum of all subgroup elements

1.start from multiplicative group modulus N where N is odd. 2.take all elements of subgroup with generator equal 2. question : what do you need to know about N (factorization,phi) for fast calculatio …
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