Riesel primes of the form 207•2n-1

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

Current data

k , b : 207 , 2 Type : 3 Count : 37 Nash : 1798 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 9, 12, 17, 20, 21, 50, 53, 132, 168, 341, 360, 381, 501, 1065, 1169, 1545, 2109, 2520, 2661, 3149, 4077, 11252, 21588, 21692, 39509, 52685, 67196, 87708, 232436, 372312, 417818, 481385, 507833, 643478, 912512, 1453970

History

• 2024-04-23: Reserved by NPLB K300 Drive 1 for n > 2000000
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2021-02-13: Checked to n = 2000000, Steven Tjung, released
• 2016-01-27: Checked to n = 2000000, Steven Tjung
• 2014-01-13: Checked to n = 1730000, Steven Tjung
• 2014-09-13: Checked to n = 1700000, Steven Tjung
• 2014-02-03: Checked to n = 1590000, Steven Tjung
• 2013-11-06: Found n = 1453970, Steven Tjung
• 2013-08-22: Checked to n = 1342000, Steven Tjung
• 2013-04-05: Checked to n = 1200000, Steven Tjung
• 2012-11-03: Checked to n = 1100000, Steven Tjung
• 2012-10-19: Checked to n = 1084000, Steven Tjung
• 2012-08-19: Checked to n = 1030000, Steven Tjung
• 2009-12-05: none, Steven Tjung
• 2009-10-06: Checked to n = 1000000, Steven Tjung
• 2009-05-14: Checked to n = 925000, Steven Tjung
• 2009-05-14: Found n = 912512, Steven Tjung
• 2009-04-06: Checked to n = 900000, Steven Tjung
• 2009-02-12: Checked to n = 845000, Steven Tjung
• 2008-01-31: Checked to n = 704000, Steven Tjung
• 2008-01-04: Checked to n = 662000, Steven Tjung
• 2007-12-07: Checked to n = 646000, Steven Tjung
• 2007-12-07: Found n = 643478, Steven Tjung
• 2007-11-01: none, Steven Tjung
• 2007-09-06: Checked to n = 586000, Steven Tjung
• 2007-07-13: Checked to n = 583000, Steven Tjung
• 2007-06-25: Checked to n = 571000, Steven Tjung
• 2007-05-14: Found n = 507833, Steven Tjung
• 2007-05-01: Found n = 481385, Steven Tjung
• 2007-04-22: Checked to n = 460000, Steven Tjung
• 2007-03-16: Found n = 417818, Steven Tjung
• 2007-03-15: Found n = 372312, Steven Tjung
• 2007-03-10: Checked to n = 342000, Steven Tjung
• 2007-01-12: Checked to n = 300000, Steven Tjung
• 2006-11-03: Checked to n = 273000, Steven Tjung
• 2006-09-05: Reserved by Steven Tjung
• 2004-08-05: Found n = 232436, Mark Anderson
• 1989: Found n = 67196, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown