# Prime mystery

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What's the mystery number?

The number N represents the first 6 digits of a special number. N consists of three prime numbers put side by side. These three prime numbers come xth, yth and zth on the list of primes, where x, y and z are themselves three consecutive primes (for example, x, y and z could be 3, 5 and 7, in which case we'd be looking at the third, fifth and seventh prime numbers). In addition, if N is split in the middle into two separate numbers, the prime factors of the left part of N add up to its right part. What is N? And what is the special number whose first 6 digits it forms?

This puzzle was contributed by Aziz Inan, Professor of Electrical Engineering at the University of Portland. His own name, when written in capital letters, is a geometric word puzzle. Swap the vowels and turn the consonants 90 degrees and the words have switched places. "My parents didn't plan this," he says. "It's just fun."

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### Ir's pi

pi=3.14159...

the primes are 31, 41 and 59, which form the 11th, 13th and 17th primes.

### pi

31, 41, 59 form 11, 13, 17 th primes and pi=3.14159...

314159 and pi

### Wow..this is cool

Wow..this is cool