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Does it continue? 2: Prime or not? (Posted on 2017-09-16) Difficulty: 3 of 5
Before trying the problems "note your opinion as to whether the observed pattern is known to continue, known not to continue, or not known at all."

Is 7013*2n+1 always composite?

Is 78557*2n+1 always composite?

No Solution Yet Submitted by Jer    
Rating: 5.0000 (1 votes)

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Does it continue? | Comment 2 of 6 |
I know it's our habit to only share a solution or possible solution here on perplexus.  With this "Does it continue?" series, feel free to share whether you guessed correctly or not.

Personally I guessed they wouldn't be the same answer, but didn't know how to proceed.

Great solution broll.  Much more thorough than the source gives.

  Posted by Jer on 2017-09-17 21:07:16
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