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                                         47 1213643211 1521119379 3773331191
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A prime such that continually deleting the outermost digits gives a prime at each step, i.e., 47121364321115211193793773331191, 712136432111521119379377333119, 1213643211152111937937733311, …, 15211193, 521119, 2111, 11. [Loungrides]

 

  Submitted: 2017-05-17 21:56:32;   Last Modified: 2017-05-17 22:02:58.



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