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Old 2021-01-19, 22:31   #9
MattcAnderson
 
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"Matthew Anderson"
Dec 2010
Oregon, USA

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For 3 tuples and 4 tuples we only need to consider divisibility by 2 and 3. We do not need to bother with divisibility by 5. So 3 tuples and 4 tuples can be all prime numbers if all the numbers are congruent to 1 or 5 modulo 6.


We say that x is relatively prime to 6 if and only if x is congruent to 1 or 5 mod 6.

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Matt
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