Riesel primes of the form 1001•2n-1

Reserved! This sequence is currently part of Multi Reservation 3: NPLB Drive 18.

Current data

k , b : 1001 , 2 Count : 40 Nash : 1525 Max n : 1,900,000 (2,170,000) Date : 2014-10-22 (2024-04-02) Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 6, 14, 54, 58, 70, 126, 138, 154, 182, 186, 326, 390, 418, 482, 506, 754, 818, 846, 858, 1094, 1870, 3234, 5326, 9998, 10442, 20782, 38206, 39258, 39666, 40434, 59042, 123990, 180130, 206082, 885618, 901926, 1381338, 2101062, 2289438

History

• 2020-06-03: Found n = 2289438, Andy Hedges
• 2020-05-27: Found n = 2101062, Andy Hedges
• 2014-11-30: 1381338 confirmed, Lennart Vogel
• 2014-10-22: Checked to n = 1900000, Peter Benson
• 2014-05-15: Checked to n = 1700000, Peter Benson
• 2014-01-26: Checked to n = 1570000, Peter Benson
• 2013-08-12: Checked to n = 1400000, Peter Benson
• 2013-06-04: Found n = 1381338, Peter Benson
• 2012-09-09: Checked to n = 1300000, Peter Benson
• 2012-04-03: Checked to n = 1200000, Peter Benson
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-09-11: Checked to n = 1100000, Peter Benson
• 2011-07-11: Checked to n = 1000000, NPLB Drive 7, released
• 2011-04-17: Checked to n = 1000000, Peter Benson
• 2011-04-11: 901926 confirmed, Pietari Snow
• 2011-04-09: 885618 confirmed, Lennart Vogel
• 2011-03-12: Checked to n = 980000, Peter Benson
• 2011-02-04: Checked to n = 960000, Peter Benson
• 2011-01-02: Checked to n = 940000, Peter Benson
• 2010-11-20: Checked to n = 920000, Peter Benson
• 2010-10-09: Checked to n = 900000, Peter Benson
• 2010-09-10: Found n = 901926, Peter Benson
• 2010-08-29: Found n = 885618, Peter Benson
• 2010-08-15: Checked to n = 880000, Peter Benson
• 2010-06-27: Checked to n = 860000, Peter Benson
• 2010-05-21: Checked to n = 840000, Peter Benson
• 2010-04-10: Checked to n = 820000, Peter Benson
• 2010-03-09: Checked to n = 800000, Peter Benson
• 2010-02-08: Checked to n = 780000, Peter Benson
• 2010-02-02: Checked to n = 770000, Peter Benson
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 7, for 600000<n<=1000000
• 2008-08-20: Checked n = 35000-50000, Karsten Bonath
• 2008-07-29: Checked n = 10000-35000, Karsten Bonath
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2007-07-06: Checked to n = 10000, Gary Barnes
• 2003-07-04: Found n = 206082, James S. Griffin
• 2003-07-12: Found n = 180130, James S. Griffin
• 2003-04-25: Found n = 123990, Andrew J. Rupinski