7841

This number is a prime.

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The first case of a prime such that removing respectively the last and first digit one obtains two consecutive perfect squares: 28²=784 and 29²=841. Moreover, notice that 28 and 29 are the possible number of days in the month of February, and 28 is a perfect number while 29 is another prime. [Leonardis]

Submitted: 2020-01-14 20:23:23;   Last Modified: 2020-01-15 12:49:07.
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