Riesel primes of the form 983•2n-1

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

Current data

k , b : 983 , 2 Count : 48 Nash : 2131 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 4, 22, 32, 54, 102, 112, 166, 172, 186, 192, 532, 616, 1322, 1464, 1552, 1852, 1904, 2772, 3060, 4404, 5086, 6572, 6986, 10394, 15032, 15584, 20472, 21860, 23972, 33120, 92734, 183734, 190212, 200136, 323820, 408920, 493212, 779022, 799052, 877520, 982604, 1076124, 1182272, 1256756, 1826160, 2064020, 2164206

History

• 2024-03-12: Found n = 2164206, Max Dettweiler
• 2023-03-19: Found n = 2064020, Max Dettweiler
• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2022-10-18: Found n = 1826160, Gary Barnes
• 2013-09-30: Found n = 1256756, Gary Barnes
• 2012-05-20: Found n = 1182272, Vaughan Davies
• 2012-03-12: Found n = 1076124, Brian Lody
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-07-11: Checked to n = 1000000, NPLB Drive 7, released
• 2011-06-20: Found n = 982604, Lennart Vogel
• 2011-04-10: Found n = 877520, Karsten Bonath
• 2011-03-10: Found n = 799052, Karsten Bonath
• 2011-02-11: Found n = 779022, Karsten Bonath
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 7, for 600000<n<=1000000
• 2008-06-26: Found n = 493212, James P. Burt
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-03-12: Found n = 408920, James P. Burt
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2004-10-10: Found n = 200136, Peter Benson
• 2004-10-10: Found n = 190212, Peter Benson
• 1004-10-10: Found n = 183734, Peter Benson