Sunday, December 11, 2016

Stubborn prime numbers

Most Prime numbers are either 1 more or 1 less than a multiple of 6 e. g
7=6×1+1
29=6×5-1
43=6×7+1
71=6×12-1
97=6×16+1
Only two prime numbers don't obey this rules which ones
Please comment below 

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