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ID NAME QUALITY USERS ACC % DIFFICULTY C I
30757 Ada and Carrot   6 137
17
34
32029 Ada and Connections   7 77
26
28
32840 Ada and Digits   15 182
20
18
32949 Ada and Digits 2   5 78
30
30
30739 Ada and Manure   18 317
11
22
30755 Ada and GCD   21 457
27
15
30691 Ada and Diary   3 63
9
9
30737 Ada and Homework   5 69
34
28
32683 Ada and Kohlrabi   5 73
30
13
32059 Ada and Taxes   16 113
23
23
5151 Alice’s Cube   8 516
24
21
10232 Distinct Primes   85 5930
10
9
4556 Think I will Buy Me a Football Team   30 2189
7
11
5451 Not So Flat After All   9 1128
11
10
13753 Amazing Prime Sequence   62 3361
10
12
30826 Bernoulli numbers   4 7
23
12
31066 Number Breaking   11 854
12
12
21357 Crucial Equation   80 6389
4
9
3505 Prime Number Theorem   25 1538
14
13
9032 Cube Free Numbers   66 4167
12
11
526 Divisors   38 1715
14
13
530 Divisors 2   10 936
12
16
22403 Divisors of factorial   71 1985
14
14
74 Divisor Summation   94 16763
7
10
23963 Easy Factorials   10 118
27
26
4141 Euler Totient Function   147 12024
8
11
22382 Euler Totient Function Depth   24 397
15
16
4942 Integer Factorization (15 digits)   45 3688
11
11
33046 Factorial Modulo Prime   4 33
46
42
25584 Factorial Modulo   25 425
10
15
25067 Fibonacci Polynomial   8 238
11
19
5970 Finding Primes   22 1345
16
15
6264 Rank of a Fraction   4 132
12
34
5978 Frequent Prime Ranges   10 717
14
14
3871 GCD Extreme   82 3095
19
26
41657 GCD Goodness   2 30
17
26
26045 GCD OF MATRIX (hard)   4 139
42
29
41507 GCD Product Sum   8 52
9
21
12005 Grass Planting   11 610
29
19
18202 HUGE GCD   17 687
14
13
4164 A conjecture of Paul Erdős   25 2677
16
14
12241 Classification from Erdős and Selfridge   5 32
28
28
27195 Find The Number   7 217
20
17
6221 Increasing Powers of K   4 360
24
34
6256 Inversion Count   534 18077
16
18
40083 Just Primes   11 124
15
17
40084 Just Primes II   7 29
34
30
12183 Help the Commander in Chief   46 916
15
16
34812 Kth Power Summation   6 61
25
19
3442 The last digit   190 30103
9
8

#number-theory

The problem involves number theory, a branch of pure mathematics

https://en.wikipedia.org/wiki/Number_theory http://mathworld.wolfram.com/NumberTheory.html http://www.math.brown.edu/~jhs/frintch1ch6.pdf http://www.britannica.com/topic/number-theory


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