12200...00221 (149-digits)

This number is a prime.

                                                                   122000000
0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000
0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000221

+ 122*10^146+221 is prime. Note that 122*10^2396+221 is a Fermat and Lucas PRP. [Earls]

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