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Williams primes of the form 10•9n+1

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Current data

Base : 9
Count : 19
Max n : 200,000
Date : 2014-03-16
2, 6, 9, 11, 51, 56, 81, 941, 1647, 7466, 9477, 9806, 11799, 16941, 33437, 35273, 43284, 93813, 95369
Remarks :
Should be (re)used from 10•3n+1.
Halved even values of sequence A005539 in OEIS

History

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