Largest number is mathematically meaningless (since in the usual system of integers, adding one to any number produces a larger number). 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
• 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
• Largest known prime number, for the largest known primes

In computing[edit]

• The constant 32767, 2147483647, or 9223372036854775807, in a word of 16, 32, or 64 bits in two's-complement format
• The constant 65535, 4294967295, or 18446744073709551615, in a word of 16, 32, or 64 bits with no sign bit
• The constant 3.4028235e+38 or 1.7976931348623157e+308, in a word of 32 or 64 bits using the binary IEEE 754-2008 floating-point representation

See also[edit]

• Infinitesimal (smallest number)