the.com/one
the loneliest number that still insists on starting every count
means The number 1, the first counting number, representing a single unit or thing.
from From Old English 'an,' the same word that gave us 'a' and 'an,' worn down over centuries from a fuller form. It traces back through Proto-Germanic 'ainaz' to the Proto-Indo-European root '*oi-no-' meaning 'one, single,' a deep ancestor it shares with Latin 'unus' (source of 'unit,' 'union') and Greek 'oine' (the single pip on a die). The 'w-' sound at the start of how we say it today is a later quirk of pronunciation, not the spelling.
not primeIt's neither prime nor composite, an exile from both clubs
identityMultiply by it, nothing changes; math's chillest operator
any powerOne raised to anything still stubbornly equals one
binary kingAll digital life runs on ones and zeros
factorial trickBoth zero and one factorial equal one