Williams primes of the form 9•10n+1

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Current data

Base : 10
Count : 21
Max n : 200,000
Date : 2015-01-21
3, 4, 5, 9, 22, 27, 36, 57, 62, 78, 201, 537, 696, 790, 905, 1038, 66886, 70500, 91836, 100613, 127240
Remarks :
The sequence A056797 in OEIS

History