33343...89091 (92-digits)

This number is a prime.

                                                    33 3435363839 4042444546
4849505152 5455565758 6062636465 6668697072 7475767778 8081828485 8687889091

The largest prime formed from the concatenation in order of n consecutive double-digit composite numbers, i.e., n=46, (33 through 91). Note that 3391 is an emirp. Note also that its length (92) is one more than the last number. [Loungrides]