ARSE

Sat 23 Jan 2021

Carol Prime Days

Enter your date of birth.
Find out when you will be celebrating!

These are primes which are also Carol numbers.

Carol numbers are of the form
**
(2n - 1) ^{2} - 2
**

Carol numbers were first studied by Cletus Emmanuel, who named them after a friend, Carol G. Kirnon.

The sixth Carol prime is 1,046,527 so it's unlikely you'll ever have more than 5 Carol Prime Days.
After that they go *very* big.