# Number Theory Forum

Number Theory Help Forum

1. ### How many digits?

• Replies: 6
• Views: 1,689
Apr 19th 2011, 12:51 PM
2. ### Finding a unique cube root

• Replies: 2
• Views: 794
Apr 19th 2011, 09:34 AM
3. ### Find function

• Replies: 5
• Views: 535
Apr 19th 2011, 05:04 AM
4. ### Help with last step of proof

• Replies: 3
• Views: 614
Apr 19th 2011, 12:00 AM
5. ### Finding a generator of a cyclic group

• Replies: 2
• Views: 2,135
Apr 16th 2011, 08:08 PM
6. ### Sum of Mobius and Divisor functions

• Replies: 1
• Views: 656
Apr 16th 2011, 06:59 PM
7. ### Irrational numbers.Why ?

• Replies: 6
• Views: 726
Apr 16th 2011, 01:12 PM
8. ### Show that it is an integer

• Replies: 1
• Views: 532
Apr 13th 2011, 01:22 AM
9. ### (10n+3,5n+2)=1

• Replies: 2
• Views: 1,027
Apr 12th 2011, 05:41 PM
10. ### Fermat's Little Theorem

• Replies: 2
• Views: 886
Apr 12th 2011, 06:28 AM
11. ### Divisibility of (n^5 - n) by 30

• Replies: 4
• Views: 2,267
Apr 12th 2011, 01:34 AM
12. ### 2p as the sum of squares

• Replies: 2
• Views: 684
Apr 12th 2011, 12:50 AM
13. ### Computing Legendre Symbol

• Replies: 0
• Views: 519
Apr 11th 2011, 08:55 PM
14. ### Congruence Proof using Wilson's Theorem

• Replies: 2
• Views: 1,154
Apr 11th 2011, 09:08 AM
15. ### sum of squares proof

• Replies: 3
• Views: 692
Apr 10th 2011, 07:24 PM
16. ### Prove that 9 is a factor of...

• Replies: 4
• Views: 930
Apr 9th 2011, 09:49 PM
17. ### Divisibility by 6

• Replies: 5
• Views: 448
Apr 9th 2011, 01:16 PM
18. ### Help understanding what this theorem means

• Replies: 2
• Views: 509
Apr 9th 2011, 01:48 AM
19. ### Show that Z=E mod 9, where E is the sum of digits of r (in dec. repres. of r)

• Replies: 1
• Views: 430
Apr 8th 2011, 04:33 PM
20. ### Greatest prime less than N

• Replies: 2
• Views: 619
Apr 8th 2011, 01:05 PM
21. ### sum of two squares?

• Replies: 2
• Views: 670
Apr 7th 2011, 08:23 AM
22. ### Basic Question regarding Simplification of congruences

• Replies: 1
• Views: 574
Apr 7th 2011, 04:24 AM
23. ### Prove this equality

• Replies: 1
• Views: 559
Apr 6th 2011, 12:16 AM
24. ### Injection implied by Surjection

• Replies: 4
• Views: 662
Apr 5th 2011, 09:16 PM
25. ### Diophantine eq

• Replies: 5
• Views: 660
Apr 5th 2011, 03:31 PM
26. ### Showing that the sum of three squares is not closed

• Replies: 1
• Views: 532
Apr 4th 2011, 01:31 PM
27. ### Divisibility by 30

• Replies: 5
• Views: 388
Apr 4th 2011, 12:13 PM
28. ### Sum over roots of unity

• Replies: 1
• Views: 767
Apr 4th 2011, 11:31 AM
29. ### Congruence Proof

• Replies: 5
• Views: 1,031
Apr 4th 2011, 05:16 AM
30. ### 5^n=3^n+8 (mod 26)

• Replies: 10
• Views: 767
Apr 3rd 2011, 07:47 PM

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