As far as I can remember I've been fascinated by number theory. Then fractals. Later I developed an interest in another abstract topic, unlimited precision arithmetic or bignums. For years I kept a copy of Knuth's Seminumerical Algorithms on my car's dashboard to peruse at odd times. I found it relaxing to read about such arcane topics as cyclic and negacyclic convolutions for multiplication after a hard day of coding.
I haunted the Carey Bloodworth site that provided accessible coverage of bignums to a non-mathematician such as me. I mirrored the site so that I could peruse it when I was off-line. Then it went dark. www.bloodworth.org is registered until 2024 according to whois but it seems "unhosted." So for fellow afficianados of bignums I have provided the source code to the multiplication demos from his site. Eventually I hope to provide the mirrored content from his site.
Multiplication Demo Source Files