# Number Theory Forum

Number Theory Help Forum

1. ### Equivalance Relations (congruences)

• Replies: 2
• Views: 764
Feb 4th 2010, 06:47 AM
2. ### f(x)≡0 (mod 15) Find all roots mod 15

• Replies: 7
• Views: 795
Feb 3rd 2010, 07:16 PM
3. ### How many six-digit positive integers are there, which is evenly divisible by 4 or 9?

• Replies: 3
• Views: 1,184
Feb 3rd 2010, 09:30 AM
4. ### Characterizing numbers.....

• Replies: 2
• Views: 389
Feb 2nd 2010, 07:00 PM
5. ### congruence in integer

• Replies: 2
• Views: 524
Feb 2nd 2010, 06:43 PM
6. ### Composite Numbers

• Replies: 2
• Views: 717
Feb 2nd 2010, 03:42 PM
7. ### Difficult Congruence related questions

• Replies: 1
• Views: 854
Feb 2nd 2010, 03:29 AM
8. ### congruence in integer #2

• Replies: 1
• Views: 474
Feb 2nd 2010, 03:24 AM
9. ### Symmetric, transitive, not reflexive?

• Replies: 1
• Views: 1,975
Feb 2nd 2010, 12:32 AM
10. ### [SOLVED] Text to speech

• Replies: 3
• Views: 477
Feb 1st 2010, 08:30 PM
11. ### Modular Arithmetic | Congruences

• Replies: 0
• Views: 408
Feb 1st 2010, 07:36 PM

• Replies: 1
• Views: 940
Feb 1st 2010, 07:03 PM
13. ### How to prove 161038 is pseudoprime?

• Replies: 2
• Views: 1,249
Feb 1st 2010, 06:47 PM
14. ### Mod proof with primes

• Replies: 2
• Views: 1,577
Feb 1st 2010, 06:32 PM
15. ### n^3 mod 6 = n mod 6

• Replies: 1
• Views: 713
Feb 1st 2010, 03:35 PM
16. ### Euler totient function

• Replies: 2
• Views: 832
Feb 1st 2010, 09:33 AM
17. ### how to solve this in natural numbers?

• Replies: 1
• Views: 434
Jan 31st 2010, 12:37 PM
18. ### Simple mod problem, not sure if I'm doing this right, can someone check me please?

• Replies: 4
• Views: 749
Jan 31st 2010, 09:49 AM
19. ### prime or not?

• Replies: 1
• Views: 425
Jan 31st 2010, 05:42 AM
20. ### product of rational and irrational is always irrational

• Replies: 2
• Views: 1,141
Jan 31st 2010, 05:40 AM
21. ### Prove that

• Replies: 1
• Views: 509
Jan 31st 2010, 05:14 AM
22. ### the Euler φ-function

• Replies: 1
• Views: 465
Jan 31st 2010, 02:59 AM
23. ### Find all the functions

• Replies: 1
• Views: 418
Jan 31st 2010, 01:07 AM
24. ### Pythagorean triples

• Replies: 8
• Views: 619
Jan 30th 2010, 06:21 AM
25. ### x^n ≡ 3 (mod 4) only if x ≡ n ≡ 1 (mod 2)

• Replies: 1
• Views: 556
Jan 30th 2010, 04:24 AM
26. ### given positive integers a and b such that a|b^2, b^2|a^3, a^3|b^4,...

• Replies: 4
• Views: 597
Jan 30th 2010, 03:59 AM
27. ### Opinion on proof(Integer divisibility)

• Replies: 5
• Views: 747
Jan 29th 2010, 10:35 PM
28. ### Diophantine eqn

• Replies: 1
• Views: 665
Jan 29th 2010, 11:37 AM
29. ### Primes of the form 4n+3

• Replies: 2
• Views: 697
Jan 29th 2010, 07:53 AM

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