Linux boots in 4.76 days on the Intel 4004
Historic 4-bit microprocessor from 1971 can execute Linux commands over days or weeks.
it takes about 4.76 days for the Linux kernel to boot.
This seems like saying, "it cost about €4,32." I.e. just the exact amount. (Though I suppose technically he could have stated it in seconds for a more precise number.)
How does it handle Doom?