Riesel primes of the form 171•2n-1

Reserved! This sequence is currently part of Multi Reservation 7: NPLB K300 Drive 3.

Current data

k , b : 171 , 2 Type : 3 Count : 50 Nash : 2674 Max n : 3,000,000 Date : 2025-03-05 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 3, 5, 10, 25, 29, 39, 73, 103, 109, 123, 198, 378, 434, 825, 925, 1265, 1802, 2134, 2199, 2629, 3154, 3490, 4093, 4814, 5490, 7029, 9074, 9298, 10249, 10505, 12185, 16382, 19030, 26237, 28890, 40123, 61483, 129309, 133527, 182745, 259262, 269539, 290403, 576733, 590818, 684003, 1362662, 1575999, 3010938

History

• 2025-03-16: Found n = 3010938, Florian Piesker, NPLB K300 Drive 3
• 2025-03-05: Reserved by NPLB K300 Drive 3 from n = 3000000
• 2025-03-05: Checked n = 2300000 - 3000000, NPLB K300 Drive 1, released
• 2024-05-16: Reserved by NPLB K300 Drive 1 from n = 2300000
• 2022-04-10: Checked n = 2200000 - 2300000, RPS Megabit Drive 2
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2019-08-18: Checked n = 1000000 - 2200000, RPS Megabit Drive 2
• 2014-02-06: Found n = 1575999, Carlos Eduardo Pinho, RPS Megabit Drive 2
• 2011-09-06: Found n = 1362662, David Metcalfe, RPS Megabit Drive 2
• 2011-04-28: Reserved by RPS Megabit Drive 2 from n = 1000000
• 2009-09-15: Checked n = 700000 - 1000000, RPS Drive 9ks, released
• 2007-12-03: Reserved by RPS Drive 9ks for n = 700000 - 1000000
• 2007-02-02: none, Thomas Masser, released
• 2005-10-05: Checked n = 300000 - 700000, Thomas Masser
• 2005-05-27: Found n = 684003, Thomas Masser
• 2005-05-23: Found n = 590818, Thomas Masser
• 2005-05-17: Found n = 576733, Thomas Masser
• 2005-01-06: Checked n = 200000 - 300000, Thomas Masser
• 2005-01-05: Found n = 269539, Thomas Masser
• 2005-01-04: Checked n = 200000 - <300000, Thomas Masser
• 2004-12-31: Found n = 290403, Thomas Masser
• 2004-12-31: Found n = 259262, Thomas Masser
• 2004-06-30: Checked n = 1 - 200000, Thomas Masser
• 2004-06-21: Found n = 182745, Thomas Masser
• 2004-06-06: Reserved by Thomas Masser
• 1999-05-22: Found n = 26237, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
• 1998-07-19: Found n = 16382, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown