∞ - I use an Optimus keyboard

Even something close to 262_144**(72*72*80) isn't ∞.

Update: Thanks to Math::BigApprox (and less than 1 CPU tick), that translates to:

 % perl -MMath::BigApprox=c -le"print c(262_144)**(72*72*80)"
7.5237e+2_247_176
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