33107

This number is a prime.

Just showing those entries submitted by 'Harrison': (Click here to show all)

A prime formed by simply right-concatenating the exponent of Mersenne prime M11 to the number of digits of the same Mersenne prime. M11 is the sixth-largest known Mersenne prime to exhibit this property. (Note also that the opposite right-concatenation, i.e. 10733 is also prime). [Harrison]