# Problem 97: Large non-Mersenne prime

![graphic](img097.gif)

The first known prime found to exceed one million digits was discovered
in 1999, and is a Mersenne prime of the form 26972593−1; it contains
exactly 2,098,960 digits. Subsequently other Mersenne primes, of the
form 2p−1, have been found which contain more digits. However, in 2004
there was found a massive non-Mersenne prime which contains 2,357,207
digits: 28433×27830457+1. Find the last ten digits of this prime number.