New posts in Number Theory

What's a half on the clock?

Co-primality and the number pi

Pentagonal numbers made from pentagonal numbers

Convolve integers in subquadratic time

Novel Prime Factors of Repunits

Priming a Pristine World

Find the sets of sums

Hilbert Primes Golf

Well that's odd... no wait, that's even!

How many squares, cubes, fourth powers, etc. do I need to sum to n?