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]

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