14391...11713 (228-digits)

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

                                                         14391429 1409139913
8113211301 1283127912 5912491237 1231122912 2312171213 1201119311 8111531151
1109110310 9710911069 1061103310 3110211009 9919839719 6795394193 7907769761
7517437397 3370970138 9359347337 3111991791 6715714911 3107977973 7137311713

The smallest googol prime formed from the reverse concatenation of the first n emirps: {1439, 1429, 1409, ..., 31, 17, 13}, (case n=68). [Bajpai]