Riesel primes of the form 275•2n-1

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

Current data

k , b : 275 , 2 Count : 29 Nash : 1581 Max n : 2,700,000 Date : 2024-10-04 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

6, 12, 16, 22, 34, 40, 72, 198, 220, 348, 376, 552, 594, 814, 972, 3168, 3702, 3834, 4642, 5116, 9720, 20434, 53692, 123678, 147802, 204516, 398928, 1846390, 2679936

History

• 2024-10-01: Found n = 2679936, Florian Piesker, NPLB K300 Drive 1
• 2024-05-05: Reserved by NPLB K300 Drive 1 for n > 2200000
• 2022-03-09: Checked to n = 2222000, RPS Megabit Drive 3
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2014-07-06: Found n = 1846390, Serge Batalov, RPS Megabit Drive 3
• 2014-06-03: Reserved by RPS Megabit Drive 3 for n > 1400000
• 2011-02-01: Checked to n = 1400000, RPS Drive 6, released
• 2008-06-22: Reserved by RPS Drive 6, for n > 600000
• 2006-12-16: Checked to n = 600000, RPS Drive 4, released
• 2006-08-21: Found n = 398928, Thomas Ritschel, RPS Drive 4
• 2006-07-28: Reserved by RPS Drive 4, for n = 260000 - 600000
• 2005-04-09: Found n = 204516, James S. Griffin
• 2004-02-04: Found n = 147802, Steven Harvey
• 2003-03-06: Found n = 123678, Andrew J. Rupinski