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  2. Class number problem - Wikipedia

    en.wikipedia.org/wiki/Class_number_problem

    The problems are posed in Gauss's Disquisitiones Arithmeticae of 1801 (Section V, Articles 303 and 304). [1] Gauss discusses imaginary quadratic fields in Article 303, stating the first two conjectures, and discusses real quadratic fields in Article 304, stating the third conjecture. Gauss conjecture (class number tends to infinity)

  3. Prime number theorem - Wikipedia

    en.wikipedia.org/wiki/Prime_number_theorem

    Another example is the distribution of the last digit of prime numbers. Except for 2 and 5, all prime numbers end in 1, 3, 7, or 9. Dirichlet's theorem states that asymptotically, 25% of all primes end in each of these four digits.

  4. Gaussian integer - Wikipedia

    en.wikipedia.org/wiki/Gaussian_integer

    both are nonzero and a 2 + b 2 is a prime number (which will not be of the form 4n + 3). In other words, a Gaussian integer m is a Gaussian prime if and only if either its norm is a prime number, or m is the product of a unit (±1, ±i) and a prime number of the form 4n + 3.

  5. Number theory - Wikipedia

    en.wikipedia.org/wiki/Number_theory

    The following are examples of problems in analytic number theory: the prime number theorem, the Goldbach conjecture (or the twin prime conjecture, or the Hardy–Littlewood conjectures), the Waring problem and the Riemann hypothesis.

  6. List of conjectures - Wikipedia

    en.wikipedia.org/wiki/List_of_conjectures

    Gauss circle problem: number theory: Carl Friedrich Gauss: 553 Gilbert–Pollack conjecture on the Steiner ratio of the Euclidean plane: metric geometry: Edgar Gilbert and Henry O. Pollak: Gilbreath conjecture: number theory: Norman Laurence Gilbreath: 34 Goldbach's conjecture: number theory: ⇒The ternary Goldbach conjecture, which was the ...

  7. Fundamental theorem of arithmetic - Wikipedia

    en.wikipedia.org/wiki/Fundamental_theorem_of...

    The fundamental theorem can be derived from Book VII, propositions 30, 31 and 32, and Book IX, proposition 14 of Euclid's Elements.. If two numbers by multiplying one another make some number, and any prime number measure the product, it will also measure one of the original numbers.

  8. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    New Mersenne conjecture: for any odd natural number, if any two of the three conditions = or =, is prime, and (+) / is prime are true, then the third condition is also true. Polignac's conjecture : for all positive even numbers n {\displaystyle n} , there are infinitely many prime gaps of size n {\displaystyle n} .

  9. Analytic number theory - Wikipedia

    en.wikipedia.org/wiki/Analytic_number_theory

    Much of analytic number theory was inspired by the prime number theorem. Let π(x) be the prime-counting function that gives the number of primes less than or equal to x, for any real number x. For example, π(10) = 4 because there are four prime numbers (2, 3, 5 and 7) less than or equal to 10.