Generalized Woodall primes of the form `n`•3ⁿ-1

Reserved! This sequence is currently reserved by: Ryan Propper

Current data

ASCII format :	n*3^n-1
Base :	3
Count :	27
Max `n` :	1,200,000
Date :	2023-04-22
Reserved :	Ryan PropperRyan Propper/Reserved

1, 2^[1], 6^[2], 10^[3], 18^[4], 40, 46, 86, 118, 170, 1172, 1698^[5], 1810, 2268^[6], 4338^[7], 18362, 72662, 88392^[8], 94110^[9], 161538^[10], 168660^[11], 292340, 401208^[12], 560750, 1035092, 1934244^[13], 2456292^[14]

Remarks :

The sequence A006553 in OEIS
See early history at Generalized Woodall news.

Notes

History

2023-04-22: Found n = 2456292, Ryan Propper
2023-04-21: Found n = 1934244, Ryan Propper
2023-04-21: Reserved by Ryan Propper
2021-09-17: Reservation dropped, Predrag Minovic
2015?: Checked n = 1058000 - 1200000, Predrag Minovic
2013?: Checked n = 1000000 - 1058000, Predrag Minovic
2013-06-17: Found n = 1035092, Predrag Minovic
2013-01-03: Reserved by Predrag Minovic for n = 1000000 - 1500000
2011-11-14: Checked n = 750000 - 1000000, Ricky L. Hubbard
2011-09-16: Reserved by Ricky L. Hubbard to n = 1000000
2011-09-16: Checked n = 403000 - 750000, Ricky L. Hubbard
2011-08-18: Found n = 560750, Ricky L. Hubbard
2011-08-05: Reserved by Ricky L. Hubbard for n = 403000 - 750000
2005-03-23: Checked n = 302000 - 403000, Predrag Minovic
2004-11-08: Found n = 401208, Predrag Minovic
2004-10-27: Checked n = 300000 - 302000, 325000 - 395000, Predrag Minovic
2004-09-15: Checked n = 256000 - 300000, Predrag Minovic
2004-08-17: Found n = 292340, Predrag Minovic
2004-06-10: Reserved by Predrag Minovic to n = 400000
2004-06-10: Checked n = 161000 - 256000, 325000 - 360000, Predrag Minovic
2004-04-20: Found n = 168660, Predrag Minovic
2004-04-19: Found n = 161538, Predrag Minovic
2004-04-16: Reserved by Predrag Minovic to n = 210000
2004-04-16: Checked n = 110000 - 161000, Predrag Minovic
2004-04-07: Reserved by Predrag Minovic to n = 160000
2004-03-26: Reserved by Predrag Minovic to n = 140000
2004-02?: Checked to n = 110000, Steven Harvey
2004-02-19: Found n = 94110, Steven Harvey
2004-02-17: Reserved by Steven Harvey to n = 110000
2003-11-03: Found n = 88392, Steven Harvey
2000-05-04: Found n = 72662, Yves Gallot
2000-02-07: Found n = 18362, Ray Ballinger
1997-03-03: Found n = 4338, Carlos Rivera

[1] Twin n=2, Riesel 2•3²-1

[2] Riesel 2•3⁷-1

[3] Riesel 10•3¹⁰-1

[4] Riesel 2•3²⁰-1

[5] Riesel 566•3¹⁶⁹⁹-1

[6] Riesel 28•3²²⁷²-1

[7] Riesel 482•3⁴³⁴⁰-1

[8] Riesel 29464•3⁸⁸³⁹³-1

[9] Riesel 31370•3⁹⁴¹¹¹-1

[10] Riesel 53846•3¹⁶¹⁵³⁹-1

[11] Riesel 18740•3¹⁶⁸⁶⁶²-1

[12] Riesel 133736•3⁴⁰¹²⁰⁹-1

[13] Riesel 214916•3^1934246-1

[14] Riesel 818764•3^2456293-1

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Generalized Woodall primes of the form `n`•3ⁿ-1

Current data

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Generalized Woodall primes of the form n•3n-1

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Generalized Woodall primes of the form `n`•3ⁿ-1