Can the difference of two Harmonic numbers be an integer?
2932
How do I prove this sum is not an integer
96303
When does $h(x^2+y^2)$ be harmonic?
69833
Number of elements not equal to their inverses is even number
107990
Does there exist an integer $x$ satisfying the following congruences?
104512
Why is $\frac{1}{2\pi i}\int_{\gamma}\frac{f'(z)}{f(z)}dz$ an integer?
132525
Real Numbers Raised to Imaginary Powers?
56229
On the difference between consecutive primes
139466
How to test if a double is an integer
137875
Are all prime numbers greater than 2 odd?
52542
For which odd positive integer $n$ , is it true that $-1$ is not a positive power of $2$ modulo $n$?
25097
Inequalities to give bounds on generalised harmonic numbers?
20486
Numbers representable as $x^2 + 2y^2$
51408
Converting numbers to integers
11470
Divisibility of integers
91951
How do I check if an integer is even or odd?
44573
Can $\pi$ be rational in some base radix
90957
Relation between Stirling numbers of first kind and harmonic numbers