I first saw the code in the early 2000's and although I figured out the newton-rapshon part I couldn't wrap my head around the magic number, until I read chris Lomont's famous paper[1]. A little gem which reminds us that not that long ago computing resources were a limited commodity.
Abundance is great and speeds up development time, but unfortunately it leads to laziness and bloat
Abundance is great and speeds up development time, but unfortunately it leads to laziness and bloat
[1] http://www.lomont.org/Math/Papers/2003/InvSqrt.pdf