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Old 2005-12-29, 09:49   #7
jasong
 
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"Jason Goatcher"
Mar 2005

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Quote:
Originally Posted by axn1
Ok. I am _slightly_ confused. There are 3 different forms you've mentioned.

n*k^2-1
n*2^k-1
n*k^n-1

Which is the form that is needed to have a prime?

The last one is called Generalized Woodall primes -- I think it can be sieved by multisieve.
I apologize, that was a typo. (n*2^k-1) and (k*2^n-1)
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