Question 289155: Find a counterexample to:The cube of a number added to the sum of five times the number and 2 is a prime number? Answer by CharlesG2(834) (Show Source):
You can put this solution on YOUR website! Find a counterexample to:The cube of a number added to the sum of five times the number and 2 is a prime number?
n is an integer number from 0 on to infinity
n^3 + (5n + 2) is a prime number ?
n n^3 + (5n + 2)
0 2
1 8
2 20
3 44
4 86
5 152
none of these results, well except when n=0 looks prime to me
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