Riesel primes of the form 251•2n-1

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

Current data

k , b : 251 , 2 Type : Low Count : 8 Nash : 417 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

6, 110, 1302, 4598, 74030, 359790, 907478, 1269198

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
• 2010-04-30: Checked to n = 2000000, James P. Burt, results included
• 2010-03-29: Found n = 1269198, James P. Burt
• 2009-10-21: Sieving, James P. Burt
• 2009-10-05: Reserved by James P. Burt
• 2009-10-05: Checked to n = 1143000, Karsten Bonath released
• 2009-04-16: Checked to n = 1100000, Karsten Bonath
• 2009-01-30: Found n = 907478, Karsten Bonath
• 2009-01-05: Reserved by Karsten Bonath
• 2007-11-25: Checked to n = 805070, Chris Chatfield, sieve file included
• 2007-11-14: Checked to n = 800000, Chris Chatfield
• 2007-08-25: Checked to n = 700000, Chris Chatfield
• 2007-07-30: Checked to n = 600000, Chris Chatfield
• 2007-07-15: Reserved by Chris Chatfield from n=545000
• 2005-03-11: Found n = 359790, Jocelyn Larouche
• 1998-12-29: Found n = 74030, Ingo Buechel, Wilfrid Keller