This is wrong.

1024^8 = 1208925819614629174706176

2^80 = 1208925819614629174706176

1208925819614629174706176 = 1 yobibyte

10^24 = 1000000000000000000000000

1000^8 = 1000000000000000000000000

1000000000000000000000000 = 1 Yottabyte

See http://en.wikipedia.org/wiki/Yottabyte

The IEC standards all now refer to Kilobytes, megabytes, gigabytes etc. being 1000^x. 1024^x is now refered to as a kibibyte, mebibyte, gibibyte etc.