Riesel primes of the form 143•2n-1

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

Current data

k , b : 143 , 2 Count : 46 Nash : 2243 Max n : 2,700,000 Date : 2024-10-04 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 4, 6, 8, 12, 18, 26, 32, 34, 36, 42, 60, 78, 82, 84, 88, 154, 174, 208, 256, 366, 448, 478, 746, 1178, 1290, 2284, 3606, 35706, 36920, 45882, 47308, 70932, 96278, 111886, 144736, 303284, 374626, 968622, 1214022, 1336358, 1406788, 1507352, 1932112, 2007888, 2400710

History

• 2024-06-06: Found n = 2400710, Göran Schmidt, NPLB K300 Drive 1
• 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
• 2016-04-09: Found n = 2007888, Carlos Eduardo Pinho, RPS Megabit Drive 2
• 2015-06-19: Reserved by RPS Megabit Drive 2 for n > 2000000
• 2012-11-06: Checked to n = 2000000, Peter Benson, released
• 2012-11-04: Found n = 1932112, Peter Benson
• 2012-10-27: Found n = 1507352, Peter Benson
• 2012-10-27: Found n = 1406788, Peter Benson
• 2012-10-26: Found n = 1336358, Peter Benson
• 2012-10-24: Found n = 1214022, Peter Benson
• 2012-10-22: Reserved by Peter Benson from n=1100000
• 2012-10-09: Checked to n = 1100000, Adam Sutton, released
• 2009-06-10: Checked to n = 1100000, Adam Sutton
• 2009-05-19: Checked to n = 985000, Adam Sutton
• 2008-11-11: Found n = 968622, Adam Sutton
• 2008-02-29: Checked to n = 684000, Adam Sutton
• 2007-12-15: Reserved by Adam Sutton
• 2006-08-13: Checked to n = 600000, RPS Drive 2, released
• 2006-05-10: Found n = 374626, Edo Rajh, RPS Drive 2
• 2006-04-03: Found n = 303284, David Metcalfe, RPS Drive 2
• 2006-03-17: Reserved by RPS Drive 2, for n = 210000 - 600000
• 2005-01-10: Checked n = 200000 - 210000, Steven Harvey, released
• 2004-05-26: Reserved by Mark Anderson for n ≤ 200000