Number Theory

Fermat's theorem, prime numbers, algebraic number theory, Euler's theorem, congruences, modulo.

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  1. MDV

    Binets formula (Fibonacci numbers) - eliminating root(5)

    MDV, Jan 18, 2020
    Replies:
    1
    Views:
    871
    paulejking
    Jul 26, 2021
  2. olgaSamara

    Are there "Petrov primes" for a > 5000 ?

    olgaSamara, Aug 19, 2021
    Replies:
    13
    Views:
    598
    olgaSamara
    Aug 24, 2021
  3. perotinus1983

    Variations on Ulam

    perotinus1983, Dec 18, 2021
    Replies:
    4
    Views:
    408
    perotinus1983
    Dec 18, 2021
  4. olgaSamara

    About the "Hoppa's numbers" (according to Petrov and not only...)

    olgaSamara, Aug 24, 2021
    Replies:
    2
    Views:
    476
    perotinus1983
    Dec 19, 2021
  5. PixelEight

    Is there any truth to this?

    PixelEight, Apr 18, 2021
    Replies:
    3
    Views:
    526
    Country Boy
    Jan 16, 2022
  6. DmitriMartila777

    Birch and Swinnerton-Dyer Conjecture

    DmitriMartila777, Apr 23, 2022
    Replies:
    0
    Views:
    208
    DmitriMartila777
    Apr 23, 2022
  7. ter

    Is Fermat's "Last Theorem" really Fermat's theorem?

    ter, May 15, 2022
    Replies:
    1
    Views:
    270
    ter
    May 15, 2022
  8. paulejking

    Not a Mersenne prime, but what is it?

    paulejking, Jul 26, 2021
    Replies:
    1
    Views:
    295
    BobLeMagnifik
    Jun 26, 2022
  9. Ian M

    Just posted this on the intro site, but think I should have posted here. Oops

    Ian M, Mar 13, 2022
    Replies:
    1
    Views:
    250
    BobLeMagnifik
    Jun 26, 2022
  10. Dimiter Skordev

    Multiplicative orders modulo powers

    Dimiter Skordev, Aug 16, 2022
    Replies:
    1
    Views:
    231
    Dimiter Skordev
    Aug 18, 2022
  11. shivajikobardan

    Is there some restrictions on values of p,q,d,e etc in RSA algorithm while trying to encrypt English

    shivajikobardan, Aug 28, 2022
    Replies:
    0
    Views:
    377
    shivajikobardan
    Aug 28, 2022
  12. jonesk79

    Doubling theory and vortex math

    jonesk79, Oct 3, 2022
    Replies:
    0
    Views:
    674
    jonesk79
    Oct 3, 2022
  13. ddinunno

    Goldbach's Conjecture - proposed proof

    ddinunno, Mar 1, 2023
    Replies:
    1
    Views:
    510
    ddinunno
    Mar 4, 2023
  14. fluo2005

    Where are all the prime numbers hidden?

    fluo2005, Feb 25, 2021
    Replies:
    12
    Views:
    786
    ddinunno
    Mar 5, 2023
  15. ddinunno

    Corrected Proof of Goldbach's Conjecture

    ddinunno, Mar 29, 2023
    Replies:
    3
    Views:
    365
    ddinunno
    Mar 31, 2023
  16. in2infinity

    Is zero a cardinal number?

    in2infinity, Apr 20, 2022
    Replies:
    2
    Views:
    279
    ddinunno
    Mar 31, 2023
  17. Martynov_M

    The Collatz conjecture

    Martynov_M, Apr 4, 2023
    Replies:
    0
    Views:
    408
    Martynov_M
    Apr 4, 2023
  18. genabutov

    Ellipses and hyperbolas of decompositions of even numbers into pairs of prime numbers.

    genabutov, Apr 7, 2023
    Replies:
    0
    Views:
    499
    genabutov
    Apr 7, 2023
  19. Seff

    Proof of countable powersets (bijection)

    Seff, May 6, 2023
    Replies:
    0
    Views:
    184
    Seff
    May 6, 2023
  20. Seff

    Proof of Countable Reals

    Seff, May 6, 2023
    Replies:
    1
    Views:
    217
    Seff
    May 8, 2023
  21. Seff

    Working on a theory of countable cardinals

    Seff, May 7, 2023
    Replies:
    3
    Views:
    268
    Seff
    May 8, 2023
  22. Seff

    The flaw in Cantor's Diagonalization Argument

    Seff, May 8, 2023
    Replies:
    6
    Views:
    351
    HallsofIvy
    Aug 5, 2023
  23. eski

    Meum -the most mysterious irrational number?

    eski, Aug 17, 2023
    Replies:
    2
    Views:
    286
    eski
    Aug 23, 2023
  24. Logic

    Modular Division Algorithm

    Logic, Aug 25, 2023
    Replies:
    0
    Views:
    169
    Logic
    Aug 25, 2023
  25. Seff

    A very simple bijection between reals and naturals

    Seff, May 7, 2023
    Replies:
    1
    Views:
    307
    HallsofIvy
    Sep 5, 2023
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