Final answer:
AMD produced the first 64-bit processor for the mass consumer market in 2003, outpacing Intel in the consumer 64-bit market entry.
Step-by-step explanation:
The first 64-bit processor for the mass consumer market was produced by AMD (Advanced Micro Devices) in 2003. Intel, known for the development of the microprocessor and a significant player in the evolution of personal computers, did not release their 64-bit processor for the consumer market until after AMD. The transition to 64-bit computing allowed for greater processing power and memory addressing, which was a significant step forward from the earlier 32-bit systems widely used in personal computers.