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Williams primes of the form 9•10ⁿ+1

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Revision as of 08:44, 26 June 2020 by Karbon (talk | contribs) (n=1038)

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Current data

Base :	10
Count :	23
Max n :	200,000
Date :	2020-06-25

3, 4, 5, 9, 22, 27, 36, 57, 62, 78, 201, 537, 696, 790, 905, 1038, 66886, 70500, 91836, 100613, 127240, 380734, 583696

Remarks :

The sequence A056797 in OEIS
For all even n-values 9•10ⁿ+1 is a Generalized Fermat number.

History

2020-06-25: Found n = 583696, Predrag Kurtovic
2019-09-18: Found n = 380734, Predrag Kurtovic
2015-01-21: Checked to n = 200000, Robert Price
2015-01-21: Found n = 127240, Robert Price
2013-09-23: Found n = 100613, Predrag Kurtovic
2005-03-10: Found n = 70500, Peter Benson
2004-12-31: Found n = 66886, Peter Benson
1994: Found n = 1038, Harvey Dubner

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Williams prime MP