10512...10231 (24-digits)

This number is a prime.

                                                  1051 2013615317 1190210231

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The smallest prime formed from concatenation of eight consecutive triangular numbers, i.e., 105, 120, 136, 153, 171, 190, 210 and 231. [Gupta]

Submitted: 2019-04-24 10:28:47;   Last Modified: 2020-06-13 07:50:40.
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