Generalized Woodall primes of the form `n`•8ⁿ-1

Current data

ASCII format :	n*8^n-1
Base :	8
Count :	16
Max `n` :	513,000
Date :	?

1^[1], 2^[2], 7^[3], 12^[4], 25^[5], 44^[6], 219^[7], 252^[8], 507^[9], 1155^[10], 2259^[11], 2972^[12], 4584^[13], 12422^[14], 13905^[15], 75606^[16]

Remarks :

The sequence A242201 in OEIS

Notes

History

2002-11-01: Found n = 75606, Steven Harvey
2000-03-06: Found n = 13905, Dirk Augustin
2000-02-27: Found n = 12422, Dirk Augustin
2000-02-05: Found n = 4584, Joe DeMaio
2000-02-04: Found n = 2972, Joe DeMaio

[1] Mersenne 2³-1

[2] Mersenne 2⁷-1

[3] Riesel 7•2²¹-1

[4] Riesel 3•2³⁸-1

[5] Riesel 25•2⁷⁵-1

[6] Riesel 11•2¹³⁴-1

[7] Riesel 219•2⁶⁵⁷-1

[8] Sophie Germain n=252, Riesel 63•2⁷⁵⁸-1

[9] Riesel 507•2¹⁵²¹-1

[10] Riesel 1155•2³⁴⁶⁵-1

[11] Riesel 2259•2⁶⁷⁷⁷-1

[12] Riesel 743•2⁸⁹¹⁸-1

[13] Riesel 573•2¹³⁷⁵⁵-1

[14] Riesel 6211•2³⁷²⁶⁷-1

[15] Riesel 13905•2⁴¹⁷¹⁵-1

[16] Riesel 37803•2²²⁶⁸¹⁹-1

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Generalized Woodall primes of the form `n`•8ⁿ-1

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Generalized Woodall primes of the form n•8n-1

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Generalized Woodall primes of the form `n`•8ⁿ-1