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Williams primes of the form 22•21ⁿ-1

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Current data

Base :	21
Count :	16
Max n :	25,000
Date :	2018-03-17

1, 8, 13, 26, 355, 985, 1347, 1918, 1968, 2802, 3310, 8113, 8728, 10906, 15042, 24051

History

2018-03-17: Checked to n = 25000, Eric Chen
2016: Checked to n = 1000, Mauro Fiorentini

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Williams prime PM