# Largest number

Largest number is mathematically meaningless (since in the usual system of integers, for every number there exist infinitely many numbers larger than it). However, the term may refer to:

• Names of large numbers, for the largest numbers with names
• Infinity, a concept which can be used as a largest number in some contexts
• Googol (10100) and Googolplex ($10^{10^{100}}$) and (Googolplexian) ($10^{10^{10^{100}}}$)
• Graham's number, once claimed as the largest number ever used in a serious mathematical proof
• Large numbers, for notations to exactly specify very large numbers