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Neither is prime (Posted on 2014-12-30) Difficulty: 2 of 5
Show that both 10101 and 10201 are composite in any base b, b>2.

No Solution Yet Submitted by Ady TZIDON    
Rating: 3.0000 (1 votes)

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Solution 10101 Comment 2 of 2 |
b^4 + b^2 + 1 = (b^2 - b + 1) * (b^2 + b + 1) 

JayDeeKay solved the 10201 case.

  Posted by Charlie on 2014-12-30 10:55:15
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