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Williams primes of the form 21•20ⁿ+1

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Current data

Base :	20
Count :	11
Max n :	100,000
Date :	2024-09-09

1^[1], 6, 191, 468, 644, 1583, 3926, 17163, 24371, 57348, 80487

Notes

↑ Twin n=1

History

2024-09-09: Checked n = 2 - 100000, Mark Rodenkirch, double-check n = 2 - 25000, released
2024-08-16: Reserved by Mark Rodenkirch for n = 2 - 100000
2018-03-09: Checked n = 1 - 25000, Eric Chen
2016: Checked n = 1 - 1000, Mauro Fiorentini

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Williams prime PP