Rules: say a prime number, that is bigger, than last prime in this thread.
It should be next number in table, after "2" you can't say "2277232917 – 1", there's a lot of primes, that is less, than 2277232917 – 1, and bigger, than 2.
Prime numbers are numbers, that are divisible only by 1 and itself.
How to detect non-primes:
Number is divisbile by 3 if all digits in it summary give a number, that is divisible by 3.
Example: 759 is divisible by 3, because 7+5+9=21. 759:3=253.
Number is divisible by 9 if also all digits in it summary give a number, that is divisible by 3.
Example: 111111111 is divisible by 9, because 1+1+1+1+1+1+1+1+1=9. 111111111:9=12345679.
Number is divisible by 2, if it's an even number (ended with 0,2,4,6,8 ).
Example: 4568 is divisible by 2, because it's an even number. 4568:2=2284.
Number is divisible by 5, if it's ended with 5 or 0.
Example: 355 is divisible by 5, because it ends with 5. 355:5=71.
Below is a table of primes, that WAS in game.
Let's start with calling the smallest known prime, it's 2.
Spoiler : Table of primes :