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Williams primes of the form 4•3ⁿ+1

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Revision as of 08:48, 8 May 2020 by Karbon (talk | contribs) (2143374)

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Current data

Base :	3
Count :	27
Max n :	1,500,000
Date :	2020-01-16

1, 2^[1], 3, 6^[2], 14^[3], 15, 39, 201, 249, 885, 1005, 1254^[4], 1635, 3306^[5], 3522^[6], 9602^[7], 19785, 72698^[8], 233583, 328689, 537918^[9], 887535, 980925, 1154598^[10], 1499606^[11], 1936890^[12], 2143374^[13]

Remarks :

The sequence A005537 in OEIS

Notes

↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat
↑ Generalized Fermat

History

2020-05-07: ?, Matthias Baur, released
2020-05-07: Found n = 2143374, Ryan Propper
2020-05-07: Found n = 1936890, Ryan Propper
2020-01-16: Checked to n = 1500000, Matthias Baur
2020-01-16: Found n = 1499606, Matthias Baur
2019-12-07: Checked to n = 1200000, Matthias Baur
2019-11-28: Found n = 1154598, Matthias Baur
2019-07-28: Checked to n = 1000000, Matthias Baur
2019-07-12: Found n = 887535, Matthias Baur
2019-07-10: Found n = 980925, Matthias Baur
2019-06-04: Checked to n = 800000, Matthias Baur
2018-12-06: Checked to n = 600000, Matthias Baur
2005-11-29: Found n = 233583, Boris Iskra
1996-12-01: Found n = 19785, Chris Caldwell
1996-12-01: Found n = 9602, Chris Caldwell
1992: Found n = 3522, Chris Caldwell
1992: Found n = 3306, Chris Caldwell

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Williams prime PP