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Number Theory Forum

Number Theory Help Forum

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

• Replies: 45
• Views: 3,070
Jun 6th 2010, 06:18 PM
2. Is it true that x = {x} ?

• Replies: 44
• Views: 2,278
Aug 2nd 2015, 01:02 PM
3. mathematical operations

• Replies: 40
• Views: 1,874
Jan 12th 2010, 11:02 PM
4. Proof by Induction?

• Replies: 39
• Views: 2,145
May 18th 2009, 05:28 AM
5. .999... = 1?

• Replies: 37
• Views: 4,715
Nov 20th 2007, 09:47 AM

• Replies: 33
• Views: 2,327
May 5th 2010, 02:14 AM
7. Primitive Pyth. triples: Solutions of x^2 + y^2 = 2 z^2

• Replies: 32
• Views: 2,091
Apr 8th 2010, 08:50 PM
8. Continued Fraction Expansion Problems

• Replies: 32
• Views: 3,453
Jul 7th 2010, 06:01 AM

• Replies: 31
• Views: 2,465
Sep 9th 2010, 02:09 PM
10. [SOLVED] Solving Diophantine Equations:

• Replies: 29
• Views: 1,760
Jun 8th 2010, 08:33 AM
11. 0!=1

• Replies: 28
• Views: 2,506
Jul 1st 2008, 03:20 PM
12. A diophantine equation

• Replies: 28
• Views: 2,465
Jun 23rd 2006, 04:19 AM
13. Mersenne numbers

• Replies: 26
• Views: 1,400
Apr 22nd 2009, 03:19 PM
14. Ad hoc summation of series

• Replies: 26
• Views: 2,068
Jan 14th 2011, 05:12 PM

• Replies: 25
• Views: 1,459
Sep 13th 2009, 09:26 AM
16. Polynomtials with multiple roots

• Replies: 24
• Views: 1,630
May 30th 2010, 07:38 PM
17. How is the sum of all natural numbers -1/12?

• Replies: 24
• Views: 2,283
Oct 30th 2015, 06:16 PM
18. Every natural number is sum of powers of 2

• Replies: 23
• Views: 4,454
Jan 13th 2010, 10:58 PM
19. [SOLVED] 3, 5, 7 primes

• Replies: 23
• Views: 1,900
Jun 3rd 2010, 10:55 AM
20. Quick's quick question

• Replies: 22
• Views: 2,727
Jul 9th 2006, 04:38 PM
21. The Battle Of Hastings

• Replies: 22
• Views: 2,222
Jul 27th 2007, 05:25 AM
22. Euler Function phi(n)

• Replies: 22
• Views: 6,719
May 29th 2010, 07:29 AM
23. Goldbach's Conjecture

• Replies: 21
• Views: 3,205
Nov 14th 2008, 03:20 PM
24. primes and unique factorization

• Replies: 21
• Views: 1,800
Jan 20th 2010, 05:54 PM
25. Fermat's Last Theorem

• Replies: 21
• Views: 1,966
Jul 19th 2012, 07:02 PM

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