79

This number is a prime.

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The smallest prime p such that when multiplied with p-1 (78 * 79 = 6162) the result is a near-tautonymic number, i.e., in this case a concatenation of two successive numbers 61 and 62 in ascending order. Note that the first halve 61 is prime as well. [De Geest]

Submitted: 2003-11-13 13:57:35;   Last Modified: 2008-01-30 11:28:00.
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