Here's a hint for you guys. I won't bother with this as I'm using an iPad and I'm lazy but...

MMIX (pronounced em-mix) is a 64-bit RISC architecture designed by ... set architecture. For the year, see 2009.
Bits‎: ‎64-bit‎
General purpose‎: ‎256‎
Endianness‎: ‎Big‎
Designer‎: ‎Donald Knuth‎