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Generalized Woodall primes of the form `n`•21ⁿ-1

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Current data

Base :	21
Count :	8
Max `n` :	400,000
Date :	?

2, 18, 200, 282, 294, 1174, 2492, 4348

History

2014-03-13: Checked to n = 25000, Steven Harvey
2010-11-01: Checked to n = 4000, Steven Harvey
2000-02-07: Found n = 4348, Joe DeMaio
2000-02-04: Found n = 2492, Joe DeMaio

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Woodall prime