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Williams primes of the form 19•20n-1
Current data
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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
- ?: Checked to n = 512, Steven Harvey
