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Williams primes of the form 10•9ⁿ+1

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Current data

Base :	9
Count :	19
Max n :	100,000
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

2014-03-16: Checked to n = 100000, Robert Price

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Williams prime PP