perplexus.info :: Just Math : Neither is prime

Neither is prime (Posted on 2014-12-30)

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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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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