10009...00007 (200-digits)

This number is a prime.

           1000900000 0000000000 0000000000 0000000000 0000000000 0000000000
0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000
0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000007

This prime number contains 197 zeros and the non-zero digits are (in sequence) 1, 9, 7. Not-to-mention that 197 is prime too! [Zonta]