Large number

The phrase "large number" has a subjective meaning, which is unsatisfactory for googologists because their studies rely on the definition of the term. Informally, it could be defined as "a number larger than any one used in everyday life." To a politician, this may be a trillion euros; to a cosmologist, 1026 meters.

Sbiis Saibian suggested defining a large number as any greater than 1, offering the alternate term superuniary number. Small numbers would be those smaller than 1. This definition has the advantage that it makes the small numbers the reciprocals of the large ones. Also, very large numbers are defined to be greater than or equal to 3, as they are larger than a large integer.

Googology Wiki defined 100 as the smallest large number. In January 2013, this restriction was lifted.