Riesel primes of the form 1471•2n-1

Current data

k , b : 1471 , 2 Type : Low Count : 12 Nash : 548 Max n : 2,000,000 Date : 2020-05-25

13, 389, 941, 1333, 9725, 19541, 158453, 173005, 302021, 386575, 848765, 1772755

History

• 2020-05-25: Checked to n = 2000000, Karsten Bonath
• 2020-04-24: Found n = 1772755, Karsten Bonath
• 2020-04-24: Checked to n = 1710000, Karsten Bonath
• 2013-02-19: Checked to n = 1000000, NPLB Drive 10, released
• 2012-05-02: 848765 confirmed, Gary Barnes, NPLB Drive 10
• 2009-06-06: Checked to n = 350000, NPLB Drive 9B, released
• 2009-04-07: Checked to n = 500000, NPLB Drive 8, released
• 2009-03-31: Reserved by NPLB Drive 10, for 500000 ≤ n ≤ 1000000
• 2009-01-28: Checked to n = 1025000, Karsten Bonath
• 2009-01-28: Checked to n = 200000, NPLB Drive 9A, released
• 2009-01-25: 386575 confirmed, Lauren Kloska, NPLB Drive 8
• 2009-01-20: Reserved by NPLB Drive 9B, for 200000 ≤ n ≤ 350000
• 2009-01-05: Reserved by NPLB Drive 9A, for 50000 ≤ n ≤ 200000
• 2008-12-30: Reserved by NPLB Drive 8, for 350000 ≤ n ≤ 500000
• 2008-10-13: Found n = 848765, Karsten Bonath
• 2007-12-24: Found n = 386575, Karsten Bonath
• 2007-12-24: Checked to n = 388000, Karsten Bonath
• 2007-12-24: Reserved by Karsten Bonath