6648647

This number is a prime.

+ 6648647 is a prime such that 6*648647+1, 66*48647+1, ... , 664864*7+1 are all prime numbers. Is it the largest with such property? Found by Adam Stinchcombe and Farideh Firoozbakht, 2003. [Rivera]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell