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Old 2005-03-16, 22:40   #12
Kosmaj
 
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Nov 2003

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Larry,
8331405*2-1 = 16662809 is also prime.

Thus, the 100th prime occurs for n=45052 while in this respect the best among "old" candidates is k=1581823815 where the 100th prime occurs for n=38374. Very close! More such results can be found here.
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