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When you substitute all the numbers from 1 to 100 into the following formula by Euler, how many numbers result in giving Prime Numbers? Here is Euler's formula: x^2 - x + 41. Any help would be great. Thank you. 
Is it: 25, 37, 68, 86?                                                                 

 Jan 18, 2019
 #1
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41, 42, 45, 50, 57, 66, 77, 82, 83, 85, 88, 90, 92, 97   give non-primes  = 14

 

So

 

100 - 14  =  86

 

 

cool cool cool

 Jan 18, 2019

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