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Generalized Cullen primes of the form n•21n+1

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Current data

Base : 21
Count : 4
Max n : 274,099
Date : 2019-11-23
2, 8, 26, 67100

History

  • ?: Checked to n = 274099, (?)
  • 2003-07-31: Found n = 67100, Günter Löh
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