10000...00697 (153-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

                                                              100 0006971000
0070310000 0709100000 7111000007 1310000072 3100000735 1000007391 0000074110
0000739100 0007351000 0072310000 0713100000 7111000007 0910000070 3100000697

The smallest prime formed from the concatenation of n consecutive n-digit semiprimes in the pattern {a, b, c, d, e, f, g, h, i, h, g, f, e, d, c, b, a}, i.e., {100000697, 100000703, 100000709, 100000711, 100000713, 100000723, 100000735, 100000739, 100000741, 100000739, 100000735, 100000723, 100000713, 100000711, 100000709, 100000703, 100000697}, (case n=9). [Bajpai]