You will obviously need big integer arithmetics extension.
tupper.sm (204 КиБ) скачан 179 раз(а).
tupper.sm (202 КиБ) скачан 171 раз(а). (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/