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Old 2009-01-18, 11:02   #16
gd_barnes
 
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May 2007
Kansas; USA

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A remarkable pair only n=58 apart for k=1643:

1643*2^352664-1 is prime


352K-353K is a highly prolific range. After 350K-351K had no primes even for the larger k=1005-2000 range, we've already 8 primes for 352K-353K (including prior known) for k=1400-2000 and there's still quite a bit to go.
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