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Old 2007-01-06, 01:36   #11
geoff
 
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Mar 2003
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Quote:
Base 17:

Covering set every 4 n, [3,5,29]. Sierpinski value of 278, the following candidates need a prime 88,92,160,244,262. On the Riesel side, the lowest is conjectured to be 86, with only k=44 needing to find a prime.
Quote:
Originally Posted by jasong View Post
Edit: 92*17^4-1 trivially factors prime!: 7683931
A prime is needed for 92*17^n+1.
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