This table shows the first few 100,000,000-digit numbers and their smallest prime factors.
number | factor
------------------+--------
10⁹⁹⁹⁹⁹⁹⁹⁹ | 2
10⁹⁹⁹⁹⁹⁹⁹⁹ + 1 | 7
10⁹⁹⁹⁹⁹⁹⁹⁹ + 2 | 2
10⁹⁹⁹⁹⁹⁹⁹⁹ + 3 | 17183
10⁹⁹⁹⁹⁹⁹⁹⁹ + 4 | 2
10⁹⁹⁹⁹⁹⁹⁹⁹ + 5 | 3
10⁹⁹⁹⁹⁹⁹⁹⁹ + 6 | 2
10⁹⁹⁹⁹⁹⁹⁹⁹ + 7 | 1181
10⁹⁹⁹⁹⁹⁹⁹⁹ + 8 | 2
10⁹⁹⁹⁹⁹⁹⁹⁹ + 9 | 367
10⁹⁹⁹⁹⁹⁹⁹⁹ + 10 | 2
10⁹⁹⁹⁹⁹⁹⁹⁹ + 11 | 3
10⁹⁹⁹⁹⁹⁹⁹⁹ + 12 | 2