A 64 bit float already gives you almost 20 significant figures; which should be sufficient for this use case.

Besides which, the metre itself is defined with reference to the speed of light, which has not been measured to a precision of anywhere near 20 significant figures.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re^3: Irrational numbers by tobyink
in thread Irrational numbers by grondilu

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