Williams primes of the form 9•10n-1

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Current data

Base : 10
Count : 21
Max n : 1,030,000
Date : 2019-01-29
1, 3, 7, 19, 29, 37, 93, 935, 8415, 9631, 11143, 41475, 41917, 48051, 107663, 212903, 223871, 260253, 364521, 383643, 1009567
Remarks :
These primes are Near-repdigit numbers;
Search limit given at sequence A056725 in OEIS is the highest n searched, however, there is a gap from 230k ≤ n ≤ 1M.

History

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