You will obviously need big integer arithmetics extension.
tupper.sm (204,5 KiB) scaricato 1368 volta(e).
tupper.sm (202,26 KiB) scaricato 1381 volta(e). (revised)

You will need Big Integer Arithmetics plugin.
You can install it from SMath>Tools>Plugins.

Wikipedia page for information about formula:
https://en.wikipedia.org/wiki/Tupper%27s_self-referential_formula

You can create your own tupper number with this site:
https://tuppers-formula.ovh/