Riesel primes of the form 147•2n-1

Reserved! This sequence is currently part of Multi Reservation 7: NPLB K300 Drive 1.

Current data

k , b : 147 , 2 Type : 3 Count : 45 Nash : 2806 Max n : 2,700,000 Date : 2024-10-04 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 2, 4, 5, 12, 25, 33, 40, 44, 53, 60, 74, 92, 133, 177, 397, 453, 669, 977, 2226, 2612, 3230, 3314, 5001, 5333, 5376, 7384, 7924, 10265, 18349, 19554, 21854, 30426, 33533, 49280, 70530, 92445, 105789, 177017, 198692, 212496, 464300, 1273684, 1374216, 1499333

History

• 2024-05-16: Reserved by NPLB K300 Drive 1 for n > 2300000
• 2022-04-10: Checked to n = 2300000, RPS Megabit Drive 2
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2019-08-18: Checked to n = 2200000, RPS Megabit Drive 2
• 2013-04-12: Found n = 1499333, David Metcalfe, RPS Megabit Drive 2
• 2011-09-12: Found n = 1374216, David Metcalfe, RPS Megabit Drive 2
• 2011-08-08: Found n = 1273684, David Metcalfe, RPS Megabit Drive 2
• 2011-04-28: Reserved by RPS Megabit Drive 2 for n > 1000000
• 2009-08-23: Checked to n = 1000000, Gary Barnes, Max Dettweiler, released
• 2009-08-11: Checked to n = 960000, Gary Barnes, Max Dettweiler
• 2009-04-28: Checked to n = 900000, Gary Barnes, Max Dettweiler
• 2009-02-06: Checked to n = 857000, Gary Barnes, Max Dettweiler
• 2009-01-23: Checked to n = 820000, Gary Barnes, Max Dettweiler
• 2009-01-18: Checked to n = 800000, Gary Barnes, Max Dettweiler
• 2008-12-25: Checked to n = 775000, Gary Barnes, Max Dettweiler
• 2008-11-28: Checked to n = 755000, Gary Barnes, Max Dettweiler
• 2008-10-31: Checked to n = 725000, Gary Barnes, Max Dettweiler
• 2008-09-21: Checked to n = 705000, Gary Barnes, Max Dettweiler
• 2008-09-08: Checked to n = 675000, Gary Barnes, Max Dettweiler
• 2008-03-27: Reserved by Max Dettweiler
• 2008-02-24: Checked to n = 600000, Chris Chatfield, released
• 2007-12-09: Checked to n = 572000, Chris Chatfield
• 2007-11-05: Reserved by Chris Chatfield
• 2006-04-27: Checked n = 100000 - 200000, Thomas Ritschel, double-check
• 2006-04-27: Checked to n = 500000, Thomas Ritschel, released
• 2006-04-15: Found n = 464300, Thomas Ritschel
• 2006-02-26: Reserved by Thomas Ritschel
• 2005-01-10: Checked n = 200000 - 210000, Steven Harvey, released
• 2004-07-01: Found n = 198692, Mark Anderson
• 2004-06-21: Found n = 177017, Mark Anderson
• 2004-05-26: Reserved by Mark Anderson for n ≤ 200000
• 1998-11-30: Found n = 49280, Chris Caldwell