Near Generalized Woodall primes of the form `(n+1)`•2ⁿ-1

Current data

ASCII format :	(n+1)*2^n-1
Base :	2
Count :	33
Max `n` :	2,000,000
Date :	2015-05-01

1^[1], 2, 3^[2], 4, 5^[3], 9^[4], 14, 15^[5], 16, 27^[6], 45^[7], 122, 125^[8], 213^[9], 242, 256, 263^[10], 290, 855^[11], 1059^[12], 2273^[13], 3945^[14], 3999^[15], 9512, 14127^[16], 16486, 20056, 28834, 41493^[17], 159147^[18], 227139^[19], 587823^[20], 3986381^[21]

Remarks :

The sequence A230769 in OEIS
See additional history at Near-Cullen & Near-Woodall primes
For additional odd n history, see Woodall n•4ⁿ-1.

Notes

History

2015-05-01: Checked n = 2000000 - 4000000 only odd n, Serge Batalov from Woodall n•4ⁿ-1
2015-05-01: Found n = 3986381, Serge Batalov
2014-11-12: Checked n = 1896000 - 2000000, Steven Harvey
2014-10-27: Checked n = 1866000 - 1896000, Steven Harvey
2014-10-10: Checked n = 1747000 - 1866000, Steven Harvey
2014-08-15: Checked n = 1720000 - 1747000, Steven Harvey
2014-07-29: Checked n = 1678000 - 1720000, Steven Harvey
2014-07-10: Checked n = 1630000 - 1678000, Steven Harvey
2014-06-03: Checked n = 1100000 - 1630000, Steven Harvey
2012-06-01: Checked to n = 1100000, Steven Harvey
2009-09-11: Found n = 587823, Steven Harvey
2000-07-28: Found n = 227139, Ray Ballinger
2000-05-19: Found n = 159147, Ray Ballinger
1998-07-03: Found n = 41493, Henri Lifchitz
1998-07-03: Found n = 28834, Henri Lifchitz
1998-07-03: Found n = 20056, Henri Lifchitz
1998-07-03: Found n = 16486, Henri Lifchitz
1998-07-03: Found n = 14127, Henri Lifchitz
1998-07-03: Found n = 3999, Henri Lifchitz
1998-07-03: Found n = 3945, Henri Lifchitz

[1] Twin n=1, Mersenne 2²-1, Woodall 4¹-1

[2] Mersenne 2⁵-1, Woodall 2•4²-1

[3] Twin n=5, Riesel 3•2⁶-1, Woodall 3•4³-1

[4] Riesel 5•2¹⁰-1, Woodall 5•4⁵-1

[5] Mersenne 2¹⁹-1, Woodall 8•4⁸-1

[6] Riesel 7•2²⁹-1, Woodall 14•4¹⁴-1

[7] Riesel 23•2⁴⁶-1, Woodall 23•4²³-1

[8] Riesel 63•2¹²⁶-1, Woodall 63•4⁶³-1

[9] Riesel 107•2²¹⁴-1, Woodall 107•4¹⁰⁷-1

[10] Riesel 33•2²⁶⁶-1, Woodall 132•4¹³²-1

[11] Riesel 107•2⁸⁵⁸-1, Woodall 428•4⁴²⁸-1

[12] Riesel 265•2¹⁰⁶¹-1, Woodall 530•4⁵³⁰-1

[13] Riesel 1137•2²²⁷⁴-1, Woodall 1137•4¹¹³⁷-1

[14] Riesel 1973•2³⁹⁴⁶-1, Woodall 1973•4¹⁹⁷³-1

[15] Riesel 125•2⁴⁰⁰⁴-1, Woodall 2000•4²⁰⁰⁰-1

[16] Riesel 883•2¹⁴¹³¹-1, Woodall 7064•4⁷⁰⁶⁴-1

[17] Riesel 20747•2⁴¹⁴⁹⁴-1, Woodall 20747•4²⁰⁷⁴⁷-1

[18] Riesel 39787•2¹⁵⁹¹⁴⁹-1, Woodall 79574•4⁷⁹⁵⁷⁴-1

[19] Riesel 56785•2²²⁷¹⁴¹-1, Woodall 113570•4¹¹³⁵⁷⁰-1

[20] Riesel 36739•2⁵⁸⁷⁸²⁷-1, Woodall 293912•4²⁹³⁹¹²-1

[21] Riesel 1993191•2^3986382-1, Woodall 1993191•4^1993191-1

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Near Generalized Woodall primes of the form `(n+1)`•2ⁿ-1

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Near Generalized Woodall primes of the form `(n+1)`•2ⁿ-1