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Williams primes of the form 4•5n-1
Current data
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History
- 2019-04-04: Checked to n = 1,000,000, Karsten Bonath
- 2019-02-23: Found n = 864751, Karsten Bonath
- 2019-01-27: Found n = 754611, Karsten Bonath
- 2018-12-24: Found n = 504221, Karsten Bonath
- 2018-12-23: Found n = 498483, Karsten Bonath
- 2018-12-06: Checked to n = 1 - 321000, found n = 282989, Karsten Bonath
- 2007-20-12: Checked to n = 200000, Geoff Reynolds
- 2007-07-13: Checked to n = 110000, Geoff Reynolds
- 2006-09-22: Checked to n = 100000, Geoff Reynolds
- 2006-07-19: Checked to n = 50000, antiroach
- 2006-07-17: Found n = 15393, antiroach
- 1981: Checked to n = 500, found n = 1 ... 339, H. C. Williams
External links
- Thread at MersenneForum
- The sequence A046865 in OEIS