'''
Large non-Mersenne prime
The first known prime found to exceed one million digits was
discovered in 1999, and is a Mersenne prime of the form 2**6972593 − 1;
it contains exactly 2,098,960 digits. Subsequently other Mersenne
primes, of the form 2**p − 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: 28433×2**7830457 + 1.
Find the last ten digits of this prime number.
'''

prime = 28433* 2 ** 7830457 + 1
a = prime % (10 ** 10)
#a = 8739992577
#.....
