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Number Theory Unsolved Problems

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Home » Olympiad Section » Number Theory » Number Theory Unsolved Problems

5933 Topics • Page 1 of 119 • 1, 2, 3, ..., 117, 118, 119 Next

Announcements			Author	Replies	Views	Last Post
		Zero tolerance Use your common sense! (enough is enough)	ZetaX	12	6070	Fri Apr 24, 2009 5:37 am Stephen
		How to post problems	Valentin Vornicu	1	4577	Wed Dec 29, 2004 2:22 am pigfly

Topics		Author	Replies	Views	Last Post
	representation of a natural number...	aadil	1	16	Today, at 4:53 am ZetaX
	p divides a^5+b^5+c^5	Jumbler	3	99	Today, at 2:52 am r3d30m3j
	digit d in the position k	ricardo4	2	161	Today, at 2:28 am L-b
	Partition the set of integers	Xaenir	2	89	Yesterday, at 11:01 pm Johan Gunardi
	m\|a^n-1	KDS	0	31	Yesterday, at 6:24 pm KDS
	Triangular and quadrangular numbers	hpoincare	1	28	Yesterday, at 1:10 pm Kouichi Nakagawa
	+1 or -1 along a circle	Xaenir	3	78	Yesterday, at 9:08 am pco
	(i+j)/(i,j) belongs to s APMO 2004	shobber	3	1081	Yesterday, at 5:01 am mavropnevma
	last nonzero digit of n!	Xaenir	7	183	Yesterday, at 3:55 am mszew
	Sum of Squares	violetcraze	6	180	Thu Nov 19, 2009 10:47 pm yzymat
	Attacking quad residue equation when p = 8n+1.	zugzwang	0	70	Thu Nov 19, 2009 10:15 am zugzwang
	Pell equation, infinitely many y divisible by k	Makaveli	1	70	Thu Nov 19, 2009 1:59 am shoki
	Integers between two successive squares	Xaenir	5	150	Wed Nov 18, 2009 4:26 pm bboypa
	Diophantine approximation	rhbestrh	2	193	Wed Nov 18, 2009 2:17 pm pleurestique
	p=12t+5	conan6032	3	138	Wed Nov 18, 2009 8:31 am shoki
	Solve inequation	ngoclam1088
	algorithm for determining the inverse	Xaenir	3	77	Tue Nov 17, 2009 9:46 pm Nukular
	2^n and 5^n start with the same digit	Xaenir	1	84	Tue Nov 17, 2009 6:33 pm Zhero
	Evaluate (mod 23) and (mod 31)	Pythagorean12	1	57	Tue Nov 17, 2009 5:02 pm Kouichi Nakagawa
	Replace a,b with gcd(a,b) and lcm(a,b)	Xaenir	1	56	Tue Nov 17, 2009 11:07 am Nukular
	exactly 14, 15 or 17 divisors	Xaenir	1	51	Tue Nov 17, 2009 11:06 am x164
	a^2+b^2-5ab+5 ; (a^2+b^2)/(ab-1) ; (a^2+ab+c^2)/(ab+1)}	Xaenir	2	52	Tue Nov 17, 2009 11:03 am bboypa
	2abc-ab-bc-ca	Xaenir	1	56	Tue Nov 17, 2009 10:59 am nayel
	Game of Euclid	Xaenir	0	46	Tue Nov 17, 2009 10:37 am Xaenir
	Divisibility	mkn19	1	53	Tue Nov 17, 2009 10:13 am shoki
	cubes of two consecutive integers	Xaenir	1	39	Tue Nov 17, 2009 9:05 am shoki
	equation	zaya_yc	0	70	Tue Nov 17, 2009 6:52 am zaya_yc
	order	Xaenir	1	76	Tue Nov 17, 2009 4:13 am MaryC
	Quadratic residue , Jacobi Symbol Pretty Hard	violetcraze	2	153	Mon Nov 16, 2009 11:54 pm shoki
	Exponent of prime p	aidan	4	226	Mon Nov 16, 2009 9:16 pm zugzwang
	Show that the number is irrational	Pythagorean12	1	79	Mon Nov 16, 2009 8:48 pm caffeineboy
	prove that n>=2^2007	hxd	2	123	Mon Nov 16, 2009 1:16 pm Evariste-Galois
	Totient function	aidan	4	168	Mon Nov 16, 2009 9:00 am broniran
	Division	mkn19	2	98	Mon Nov 16, 2009 8:41 am pco
	Product of distinct primes	Xaenir	3	93	Mon Nov 16, 2009 6:19 am pco
	Convert to linear recursive ? is it possible...	srinath.r	6	187	Mon Nov 16, 2009 4:56 am srinath.r
	Large Gaps between Binary Quadratic Forms	violetcraze	3	132	Mon Nov 16, 2009 4:03 am jin thynj
	Russian competition diophant equation	Cekaa	15	560	Sun Nov 15, 2009 10:14 pm warut
	equation	zaya_yc	5	143	Sun Nov 15, 2009 7:05 am Evariste-Galois
	prime no	sophie germain	5	217	Sun Nov 15, 2009 5:08 am srinath.r
	binomial coefficient (nice)	math10	6	165	Sun Nov 15, 2009 5:00 am shoki
	F(n)<f(n+1)<f(n+2)	jin	12	819	Sun Nov 15, 2009 12:05 am jin thynj
	Easy three variable problem	Rijul saini	0	58	Sat Nov 14, 2009 11:43 pm Rijul saini
	Seems to be easy	Rijul saini	3	135	Sat Nov 14, 2009 11:30 pm Rijul saini
	integer	Algadin	3	79	Sat Nov 14, 2009 7:48 pm bboypa
	Divisility by 7 Indonesian MO (INAMO) 2009, Day 1, Problem 1	wangsacl	8	735	Sat Nov 14, 2009 7:29 pm bboypa
	Multiplicative function number Theory	violetcraze	1	87	Sat Nov 14, 2009 6:43 pm pleurestique
	set polynomial	math10	2	94	Sat Nov 14, 2009 4:15 pm math10
	problem MOSP 2000	math10	3	137	Sat Nov 14, 2009 4:11 pm math10
	perfect cubes	AndrewTom	2	97	Sat Nov 14, 2009 3:11 pm dgreenb801
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5933 Topics • Page 1 of 119 • 1, 2, 3, ..., 117, 118, 119 Next

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