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11Axx - Elementary number theory

11A05 - Multiplicative structure; Euclidean algorithm; greatest common divisors - 52 items
11A07 - Congruences; primitive roots; residue systems - 15 items
11A15 - Power residues, reciprocity - 17 items
11A25 - Arithmetic functions; related numbers; inversion formulas - 94 items
11A41 - Primes - 102 items
11A51 - Factorization; primality - 66 items
11A55 - Continued fractions - 14 items
11A63 - Radix representation; digital problems - 89 items
11A67 - Other representations - 9 items
11A99 - Miscellaneous - 18 items

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