Amazing Prime Fact

Amazing Prime Numbers: 
    There are few amazing prime numbers, which are unbelievable. Here are some funny math interesting facts of prime numbers.


Here are few amazing prime numbers, these prime numbers were proved by the XVIIIth century.


31
331
3331
33331
333331
3333331
33333331


The next number 333333331 is not a prime number. Whereas it is multiplied by 17 x 19607843 = 333333331.