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Prime, but not forever (Posted on 2010-08-12) Difficulty: 3 of 5
Cosider the following sequence :
a(0) = p, where p is a prime
a(i+1) =2*a(i)+1) : e.g. 5, 11, 23, 47,...
Prove that there is no value of p creating a sequence of prime numbers only.

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

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  Subject Author Date
proofDaniel2010-08-12 13:42:36
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