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Williams primes of the form 6•5ⁿ+1

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Current data

Base :	5
Count :	21
Max n :	10,000,000
Date :	2024-09-02

1^[1], 2^[2], 3, 23, 27, 33, 63, 158, 278, 290, 351, 471, 797, 8462, 28793, 266030, 439191, 862923, 1392287, 1403337, 6546983

Remarks :

The sequence A143279 in OEIS

Notes

↑ Twin n=1
↑ Twin n=2

History

2024-09-02: Reservation dropped, Ryan Propper
2020?: Checked n = 5000000 - 10000000, Ryan Propper
2020-06-17: Checked n = 1300000 - 5000000, Ryan Propper
2020-06-13: Found n = 6546983, Ryan Propper
2020-06-04: Checked n = 1000000 - 1300000, Ryan Propper
2020-06-04: Found n = 1403337, Ryan Propper
2020-06-04: Found n = 1392287, Ryan Propper
2020-06-03: Checked n = 300000 - 1000000, Ryan Propper
2020-06-03: Found n = 862923, Ryan Propper
2019-11-01: Reserved by Ryan Propper
2015-01-16: Checked n = 50000 - 300000, Robert Price
2008-08-04: Checked n = 1 - 50000, Rick L. Shepherd
1998-11-02: Found n = 8462, Wilfrid Keller

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Williams prime PP