All Questions
Tagged with prime-factorization algebra-precalculus
2
questions
6
votes
2
answers
9k
views
Total number of divisors of factorial of a number
I came across a problem of how to calculate total number of divisors of factorial of a number. I know that total number of divisor of a number $n= p_1^a p_2^b p_3^c $ is $(a+1)*(b+1)*(c+1)$ where $a,...
- 298
2
votes
2
answers
251
views
How does one prove that $(2\uparrow\uparrow16)+1$ is composite?
Just to be clear, close observation will show that this is not the Fermat numbers.
I was reading some things (link) when I came across the footnote on page 21, which states the following:
$$F_1=2+1\...
