What is the largest number ever written ?

Answer 1

If you mean writing a number in plain decimal form, you can write a 1 on a piece of paper, then have your printer start printing pages full of zeros. If you keep at it long enough, you might set a world record.

However, exponential notation allows for extremely large numbers to be written in small form. For example, the number of atoms in the known universe is around 10^80. It doesn't look too impressive when written that way. But if you write it out, it looks like this:
100 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000.

There's another notation for recursive exponents. That is, an number to an exponent, which is itself raised to an exponent, which is also raised to an exponent, and so on.

See Graham's number for more detail:
http://en.wikipedia.org/wiki/Graham's_number

Answer 2

Largest Number Ever Written

Answer 3

You can ask this question in other way...."which is the largest number?' When you ask what is the largest number ever written, the answer cannot be told perfectly because anyone can break that record by adding a single number.
Now coming to the real question : which is the largest number?
The answer is : "I DON'T KNOW." Whoever asks you to tell the largest number, never say infinity....INFINITY IS NOT A NUMBER. It is just a symbol of a value that we don't know.

and about your question I am saying again that none can give the answer perfectly.

Answer 4

The largest number I've ever seen written is called a googolplex.

A googol is the number 10^100, or a 1 followed by 100 zeroes. A googolplex is 1 raised to the googol power,
or 10^ (10^100), an unbelievably enormous number!!!

Answer 5

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Graham's Number is usually quoted as the largest number that has ever been named or used. A mathematician called Graham used it in a proof in 1971. It is sometimes referred to as g64, for conciseness. It is absolutely enormous. It uses 64 layers of an arrow notation invented by Donald Knuth, such that even g1 is mind-bogglingly large, g2 is big enough to completely dwarf g1, and so on.

Answer 6

If you believe that k is the largest number ever written, then I can write:
k + 1.
There isn't therefore any such number.

Answer 7

9.9x10^99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
etc.

You could argue infinity, but infinity isn't really a number as it has no value.

Answer 8

Turn a 8 sideways, it represents infinity.

Answer 9

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