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#### The Chaz

##### Member

- Jan 26, 2012

- 24

2. Show that there are infinitely many n such that both 6n + 1 and 6n - 1 are composite. Without CRT, if possible.

My work... let n = 6^{2k}.

Then 6n \pm 1 = 6^{2k + 1} \pm 1...

Hmm. Having a hard timing finding the LaTexification button from my iPhone...

To be continued.