# 71

This number is a prime.

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Jeffery Marshall © 2002 |

There are no nines in the first 71 multiples of 125. Is there any number that has more than 71 nineless first n multiples? [Gaydos]

The sum of the first 71 brilliant numbers (35821) is a brilliant number. [Gaydos]

The sum of the digits of the first 71 semiprimes is 666. [Gaydos]

(There is one curio for this number that has not yet been approved by an editor.)

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