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
• 2009-09-15: Checked n = 770000 - 1000000, RPS Drive 9ks, released
• 2009-08-10: Found n = 984683, Carlos Eduardo Pinho, RPS Drive 9ks
• 2009-06-10: Found n = 891876, Adam Sutton, RPS Drive 9ks
• 2009-06-05: Found n = 888200, Predrag Minovic, RPS Drive 9ks
• 2008-05-11: Reserved by RPS Drive 9ks for n = 770000 - 1000000
• 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 n = 73401 - 200000, Steven Harvey, released
• 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