10 to the power 10 to the power 118 metres?

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dhejejjeskms

Senior Member
Hello, everyone.

Source : BBC

By the same logic, rather farther away there is an entire observable universe identical to ours. This distance can be estimated at about 10 to the power 10 to the power 118 metres.

What does "10 to the power 10 to the power 118 metres" mean?
Thank you.

• entangledbank

Senior Member
I would say '10 to the power of 118', but some people might leave out 'of'. This is 1 followed by 118 zeroes: 10 to the power of 3 is 1000. Then you take 1 and put this very large number of zeroes after it: that's 10 to the power of (10 to the power of 118). (We can't do superscripts here, so I can't show the proper notation.)

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Archilochus

Senior Member
10 to the power (10 to the power 118) metres = 10x(10x118) meters, i.e. the number 1 followed by 1,180 zeros meters.

Uncle Jack

Senior Member
10 to the power 118 is 1 followed by 118 zeros (10118).
10 to the power of this number is 1 followed by 10118 zeroes.
The units are metres.

For context, the diameter of the universe is of the order of 1026 metres.

Edit, for entangledbank: Yes we can do superscripts; the tag is sup. Use square brackets, and /sup as a terminator, as I am sure you know.

Andygc

Senior Member
Like this 10[sup]118[/sup] which gives you 10118

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