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# Number Theory Forum

Number Theory Help Forum

1. ### Prime Numbers (difficult question about something seemingly simple)

• Replies: 45
• Views: 2,965
Jun 6th 2010, 07:18 PM
2. ### Is it true that x = {x} ?

• Replies: 44
• Views: 2,210
Aug 2nd 2015, 02:02 PM
3. ### mathematical operations

• Replies: 40
• Views: 1,822
Jan 13th 2010, 12:02 AM
4. ### Proof by Induction?

• Replies: 39
• Views: 2,066
May 18th 2009, 06:28 AM
5. ### .999... = 1?

• Replies: 37
• Views: 4,631
Nov 20th 2007, 10:47 AM

• Replies: 33
• Views: 2,272
May 5th 2010, 03:14 AM
7. ### Primitive Pyth. triples: Solutions of x^2 + y^2 = 2 z^2

• Replies: 32
• Views: 2,047
Apr 8th 2010, 09:50 PM
8. ### Continued Fraction Expansion Problems

• Replies: 32
• Views: 3,364
Jul 7th 2010, 07:01 AM
9. ### Primes in Quadratic Fields

• Replies: 31
• Views: 2,394
Sep 9th 2010, 03:09 PM
10. ### [SOLVED] Solving Diophantine Equations:

• Replies: 29
• Views: 1,721
Jun 8th 2010, 09:33 AM
11. ### 0!=1

• Replies: 28
• Views: 2,471
Jul 1st 2008, 04:20 PM
12. ### A diophantine equation

• Replies: 28
• Views: 2,426
Jun 23rd 2006, 05:19 AM
13. ### Mersenne numbers

• Replies: 26
• Views: 1,373
Apr 22nd 2009, 04:19 PM
14. ### Ad hoc summation of series

• Replies: 26
• Views: 1,979
Jan 14th 2011, 06:12 PM

• Replies: 25
• Views: 1,444
Sep 13th 2009, 10:26 AM
16. ### Polynomtials with multiple roots

• Replies: 24
• Views: 1,584
May 30th 2010, 08:38 PM
17. ### How is the sum of all natural numbers -1/12?

• Replies: 24
• Views: 2,169
Oct 30th 2015, 07:16 PM
18. ### Every natural number is sum of powers of 2

• Replies: 23
• Views: 4,346
Jan 13th 2010, 11:58 PM
19. ### [SOLVED] 3, 5, 7 primes

• Replies: 23
• Views: 1,805
Jun 3rd 2010, 11:55 AM
20. ### Quick's quick question

• Replies: 22
• Views: 2,601
Jul 9th 2006, 05:38 PM
21. ### The Battle Of Hastings

• Replies: 22
• Views: 2,155
Jul 27th 2007, 06:25 AM
22. ### Euler Function phi(n)

• Replies: 22
• Views: 6,649
May 29th 2010, 08:29 AM
23. ### Goldbach's Conjecture

• Replies: 21
• Views: 3,124
Nov 14th 2008, 04:20 PM
24. ### primes and unique factorization

• Replies: 21
• Views: 1,694
Jan 20th 2010, 06:54 PM
25. ### Fermat's Last Theorem

• Replies: 21
• Views: 1,871
Jul 19th 2012, 08:02 PM

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