FYI -- In an age where you can purchase 128GB uSD cards for $50 (or less), who needs to do any calculations anymore? https://www.amazon.com/gp/product/B01M4MW74V Silicon Power 128GB Elite microSDXC UHS-1 Memory Card - with Adapter (SP128GBSTXBU1V20BS) Price: $49.99 & FREE Shipping --- I assume that we'll be back to purchasing (digital) math tables again. That's certainly the case today for modular and EC arithmetic. :-) As you can guess from the discussions, the article below was written quite a while ago, but his argument has gotten much better during the interim. http://wilsonminesco.com/16bitMathTables/ Large Look-up Tables for Hyperfast, Accurate, 16-Bit Scaled-Integer Math (Describes how to interface large -- greater than address space size -- ROMs to 8-bit microprocessors for ADC computations.)