Riesel primes of the form 447•2n-1

Reserved! This sequence is currently part of Multi Reservation 8: NPLB Drive 17.

Current data

k , b : 447 , 2 Type : 3 Count : 67 Nash : 3418 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 4, 5, 6, 12, 14, 18, 20, 22, 30, 38, 45, 56, 60, 69, 78, 106, 132, 174, 224, 232, 445, 572, 621, 674, 1182, 1500, 1612, 1930, 1969, 2112, 2610, 3084, 3536, 5002, 7526, 7774, 7960, 8464, 9482, 10002, 12102, 15321, 18926, 45697, 49381, 49480, 58621, 63257, 75926, 78369, 88740, 130586, 178392, 179742, 191720, 209576, 218180, 310829, 339169, 377286, 585292, 610250, 807089, 836966, 918282, 1753942

History

• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2022-04-10: Found n = 1753942, Florian Piesker
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-10-27: Found n = 918282, Ian M. Gunn
• 2010-06-28: Found n = 836966, Vaughan Davies
• 2010-06-02: Found n = 807089, Gary Barnes
• 2009-01-04: Found n = 610250, Chris Chatfield
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-12-09: Found n = 585292, Gary Barnes
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2005-08-17: Found n = 377286, Peter O'braian
• 2005-03-08: Found n = 339169, Peter O'braian
• 2005-03-03: Found n = 310829, Peter O'braian
• 2004-10-17: Found n = 218180, Peter O'braian
• 2004-10-16: Found n = 209576, Peter O'braian
• 2003-04-10: Found n = 191720, Dennis Okon
• 2003-04-10: Found n = 179742, Dennis Okon
• 2003-04-10: Found n = 178392, Dennis Okon
• 2003-03-10: Found n = 130586, Dennis Okon
• 2002-01-12: Found n = 88740, Kimmo Herranen