Riesel primes of the form 175•2n-1

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

Current data

k , b : 175 , 2 Count : 41 Nash : 1792 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 3, 9, 21, 23, 41, 47, 57, 69, 83, 193, 249, 291, 421, 433, 997, 1269, 1619, 1893, 2457, 3527, 9579, 14699, 15677, 16479, 21293, 30729, 33609, 47437, 143691, 244073, 244393, 282719, 309593, 387513, 529417, 1065181, 1162313, 1571521, 1711779, 2553699

History

• 2024-07-30: Found n = 2553699, Florian Piesker, NPLB K300 Drive 1
• 2024-05-16: Reserved by NPLB K300 Drive 1 for n > 2300000
• 2022-04-10: Checked to n = 2300000, RPS Megabit Drive 2
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2019-08-18: Checked to n = 2200000, RPS Megabit Drive 2
• 2014-07-03: Found n = 1711779, Carlos Eduardo Pinho, RPS Megabit Drive 2
• 2013-12-19: Found n = 1571521, Predrag Minovic, RPS Megabit Drive 2
• 2011-06-28: Found n = 1162313, David Metcalfe, RPS Megabit Drive 2
• 2011-05-31: Found n = 1065181, David Metcalfe, RPS Megabit Drive 2
• 2011-04-28: Reserved by RPS Megabit Drive 2 for n > 1000000
• 2009-07-30: Reserved by Borys Jaworski for sieving only n=1000000-5000000
• 2008-10-22: Checked to n = 1000000, NPLB Drive 4, released
• 2008-10-21: Checked to n = 1000000, Predrag Minovic
• 2008-09-12: Reserved by Predrag Minovic
• 2008-09-09: Reserved by NPLB Drive 4
• 2006-08-13: Checked to n = 600000, RPS Drive 2, released
• 2006-06-27: Found n = 529417, Predrag Minovic, RPS Drive 2
• 2006-04-24: Found n = 387513, Predrag Minovic, RPS Drive 2
• 2006-04-06: Found n = 309593, David Metcalfe, RPS Drive 2
• 2006-03-30: Found n = 282719, David Metcalfe, RPS Drive 2
• 2006-03-25: Found n = 244393, Larry Soule, RPS Drive 2
• 2006-03-25: Found n = 244073, Larry Soule, RPS Drive 2
• 2006-03-17: Reserved by RPS Drive 2, for n = 210000 - 600000
• 2006-02-06: Checked n = 100000 - 133600, Thomas Ritschel, double-check
• 2005-01-12: Checked to n = 210000, Steven Harvey, released
• 2005-01-10: Reserved by Steven Harvey
• 2004-08-06: Checked n = 133559 - 200000, Steven Harvey, released
• 2004-08-03: Reserved by Steven Harvey for n ≤ 200000