I came across this definition of 正{せい} and I can't fathom what purpose such a large number (10,000,000,000,000,000,000,000,000,000,000,000,000,000) could serve, it looks strange to me that there is even a particular kanji to represent it.
Do you know if there is any context or use for it?
How did 正 come to mean 10^40?
