[jcwayne]

I'm genuinely curious, does anyone actually want/need to look at numbers larger than will fit in a 128bit int? I understand there are applications that require use and storage of such numbers, but how often is there are real need to display them?

[neunhoef]

In discrete mathematics this happens a lot. Group orders, sizee of conjugacy classes, semigroup orders, numbers of isomorphism classes, character degrees, etc.

[Retra]

"It happens" doesn't imply there's any need for it to happen.