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# Number Theory Forum

Number Theory Help Forum

1. ### Find the number of pairs (x,y)

• Replies: 5
• Views: 1,300
Apr 16th 2017, 03:04 AM
2. ### Show that for any positive integer m,n, (3×9^n +1)/( 6 m -1 ) is not an integer

• Replies: 0
• Views: 700
Apr 10th 2017, 09:22 AM
3. ### Find all prime numbers that divide 50!.

• Replies: 2
• Views: 2,868
Apr 10th 2017, 08:27 AM
4. ### Find minimum natural value of n such that (n/2)^n > n! > (n/3)!

• Replies: 4
• Views: 879
Apr 2nd 2017, 07:26 PM
5. ### Very prime like number

• Replies: 4
• Views: 996
Mar 31st 2017, 05:52 AM
6. ### Congruence

• Replies: 1
• Views: 463
Mar 22nd 2017, 09:15 AM
7. ### Basic algorithm behind this quesiton

• Replies: 1
• Views: 589
Mar 18th 2017, 05:12 AM
8. ### Euler's and Möbius function

• Replies: 2
• Views: 629
Mar 17th 2017, 07:49 AM
9. ### isomorphic rings

• Replies: 1
• Views: 587
Mar 8th 2017, 03:05 PM
10. ### how can beh 7 divides y

• Replies: 5
• Views: 690
Mar 5th 2017, 11:31 PM
11. ### Modulo

• Replies: 1
• Views: 459
Mar 3rd 2017, 10:31 PM
12. ### Is this Correct?

• Replies: 2
• Views: 543
Mar 3rd 2017, 01:23 PM
13. ### (mod n)

• Replies: 4
• Views: 589
Mar 2nd 2017, 12:54 AM
14. ### Remainder

• Replies: 1
• Views: 601
Feb 27th 2017, 07:34 AM
15. ### how is this possible without using example....by proving

• Replies: 2
• Views: 565
Feb 22nd 2017, 07:48 PM
16. ### Good Day! just need Guidance on my process.

• Replies: 3
• Views: 776
Feb 21st 2017, 09:47 AM
17. ### Solving linear congruence

• Replies: 2
• Views: 812
Feb 16th 2017, 06:34 AM
18. ### Divisibility of repunits base 3

• Replies: 0
• Views: 592
Feb 2nd 2017, 05:14 AM
19. ### Patterns between 4x3 matrices

• Replies: 1
• Views: 531
Feb 1st 2017, 02:56 PM
20. ### Closed form for Partial Sum of a Floor Function

• Replies: 0
• Views: 717
Jan 17th 2017, 11:13 AM
21. ### Need help getting an intuitive idea of big-Omega notation

• Replies: 6
• Views: 882
Dec 17th 2016, 02:59 PM
22. ### Finding direct formula of recursive sequence

• Replies: 2
• Views: 954
Nov 29th 2016, 06:06 PM
23. ### The relationships between Prime number and Fibonacci number

• Replies: 0
• Views: 536
Nov 16th 2016, 04:29 PM
24. ### Not understanding the simplification of this factorial notation

• Replies: 1
• Views: 436
Nov 16th 2016, 07:13 AM
25. ### If p and q are distinct odd primes, prove 2pq+1≡2p+q(modpq)

• Replies: 2
• Views: 703
Nov 10th 2016, 04:56 PM
26. ### Factorial problem help!

• Replies: 5
• Views: 566
Nov 9th 2016, 10:18 AM
27. ### Very large numbers!

• Replies: 3
• Views: 571
Oct 26th 2016, 04:38 PM

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### Phi(mn)=phi(gcd(m,n))phi(lcm(m,n))

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