# Number Theory Forum

Number Theory Help Forum

1. ### [SOLVED] modulo inverse

• Replies: 3
• Views: 592
Jun 16th 2011, 09:52 AM
2. ### [SOLVED] When p is a prime prove that p | {p \choose k}

• Replies: 3
• Views: 628
Jun 16th 2011, 06:38 AM
3. ### some of congruence problems

• Replies: 2
• Views: 749
Jun 16th 2011, 04:28 AM
4. ### Prove that a variant of binomical coefficient is integer

• Replies: 4
• Views: 956
Jun 15th 2011, 08:27 AM
5. ### [SOLVED] if ra\equiv rb (mod m), then a\equiv b (mod \frac{m}{gcd(r,m)})

• Replies: 1
• Views: 793
Jun 15th 2011, 08:04 AM
6. ### nth cube free number

• Replies: 1
• Views: 711
Jun 14th 2011, 11:17 AM
7. ### A number theoritic problem

• Replies: 8
• Views: 504
Jun 14th 2011, 09:39 AM
8. ### Show that the nth harmonic number is not an integer

• Replies: 3
• Views: 1,879
Jun 14th 2011, 05:11 AM
9. ### [SOLVED] Prove that there are infinitely many primes in the form 6k+5

• Replies: 1
• Views: 1,680
Jun 13th 2011, 10:43 PM
10. ### [SOLVED] Greatest Common Divisor Problen: If gcd(a, b) = 1, solve gcd(a^2 + b^2, a + b)

• Replies: 3
• Views: 678
Jun 13th 2011, 04:02 PM
11. ### simple gcd proofs

• Replies: 6
• Views: 1,054
Jun 13th 2011, 05:30 AM
12. ### Cube number

• Replies: 6
• Views: 615
Jun 12th 2011, 05:45 AM
13. ### [SOLVED] gcd(a,b) = 1 iff no primes divide a and b

• Replies: 4
• Views: 537
Jun 12th 2011, 04:04 AM
14. ### [SOLVED] Golden Ratio

• Replies: 6
• Views: 713
Jun 11th 2011, 06:00 PM
15. ### Triangular Factorials proof

• Replies: 1
• Views: 700
Jun 9th 2011, 11:18 AM
16. ### Breaking a stick of lenght of power of 2

• Replies: 1
• Views: 651
Jun 8th 2011, 10:01 AM
17. ### congruence, relation x^2+y^2=Z^2, then 60|xyz

• Replies: 1
• Views: 893
Jun 8th 2011, 08:51 AM
18. ### Congruence, prime number, integer

• Replies: 1
• Views: 590
Jun 8th 2011, 08:10 AM
19. ### About Z as cyclic group??

• Replies: 2
• Views: 560
Jun 7th 2011, 06:06 PM
20. ### [SOLVED] Fibonacci Number Proof

• Replies: 3
• Views: 664
Jun 7th 2011, 07:52 AM
21. ### Three-digit numbers

• Replies: 0
• Views: 588
Jun 6th 2011, 10:50 PM
22. ### Can the ratio of a non-existent number to an imaginary number....

• Replies: 2
• Views: 696
Jun 6th 2011, 06:39 PM
23. ### hurwitz zeta function

• Replies: 2
• Views: 722
Jun 5th 2011, 04:59 PM
24. ### Finding the last two decimal places.....

• Replies: 0
• Views: 574
Jun 5th 2011, 10:46 AM
25. ### Fibonaci sequence terms.

• Replies: 9
• Views: 878
Jun 4th 2011, 05:32 AM
26. ### Sum of Reciprocal of primes

• Replies: 3
• Views: 958
Jun 3rd 2011, 07:07 AM
27. ### Stirling numbers - hard proofs

• Replies: 4
• Views: 833
Jun 2nd 2011, 06:03 PM
28. ### finding a number

• Replies: 0
• Views: 442
Jun 2nd 2011, 10:10 AM
29. ### [SOLVED] b=aq+r then gcd(b,a)=gcd(a,r)

• Replies: 2
• Views: 1,648
May 31st 2011, 03:30 PM
30. ### modulo arithmetic proof

• Replies: 1
• Views: 630
May 31st 2011, 08:27 AM

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