Riesel primes of the form 189•2n-1

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

Current data

k , b : 189 , 2 Type : 3 Count : 62 Nash : 2793 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 4, 5, 8, 11, 12, 24, 33, 44, 48, 56, 76, 93, 108, 172, 216, 304, 363, 401, 420, 500, 545, 581, 756, 875, 1552, 1931, 2740, 2787, 2825, 3443, 5235, 8444, 10523, 12755, 14585, 21161, 24404, 25880, 31316, 31965, 32040, 34233, 34323, 36443, 54436, 69403, 175901, 213856, 235068, 237968, 239891, 246356, 255372, 323900, 480835, 487601, 496835, 888200, 891876, 984683, 1547744

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
• 2014-01-27: Found n = 1547744, Carlos Eduardo Pinho, RPS Megabit Drive 2
• 2011-04-28: Reserved by RPS Megabit Drive 2 for n > 1000000
• 2009-09-14: Checked to n = 1000000, RPS 9ks Drive, released
• 2009-08-10: Found n = 984683, Carlos Eduardo Pinho, RPS 9ks Drive
• 2009-06-10: Found n = 891876, Adam Sutton, RPS 9ks Drive
• 2009-06-05: Found n = 888200, Predrag Minovic, RPS 9ks Drive
• 2007-12-03: Reserved by RPS 9ks Drive for n > 770000. See post that started drive here.
• 2007-11-01: Checked n = 700000 - 770000, Predrag Minovic, released
• 2007-02-02: Checked to n = 700000, Thomas Masser, released
• 2005-10-05: Checked to n = 700000, Thomas Masser
• 2005-04-16: Found n = 480835, Thomas Masser
• 2005-04-02: Found n = 487601, Thomas Masser
• 2005-04-01: Found n = 496835, Thomas Masser
• 2005-02-25: Found n = 323900, Thomas Masser
• 2005-01-06: Checked to n = 300000, Thomas Masser
• 2005-01-04: Checked n = 200000  -  <300000, Thomas Masser
• 2004-12-31: Found n = 255372, Thomas Masser
• 2004-12-31: Found n = 246356, Thomas Masser
• 2004-12-15: Found n = 239891, Thomas Masser
• 2004-12-14: Found n = 237968, Thomas Masser
• 2004-12-13: Found n = 235068, Thomas Masser
• 2004-12-02: Found n = 213856, Thomas Masser
• 2004-08-12: Checked to n = 200000, Steven Harvey
• 2004-08-12: Found n = 175901, Steven Harvey
• 2004-08-06: Reserved by Steven Harvey for n ≤ 200000
• 1989: Found n = 34233, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1989: Found n = 31965, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1989: Found n = 24404, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1989: Found n = 21161, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1989: Found n = 14585, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown