Riesel primes of the form 115•2n-1

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

Current data

k , b : 115 , 2 Count : 35 Nash : 1954 Max n : 2,700,000 Date : 2024-10-04 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 3, 11, 13, 19, 21, 31, 49, 59, 69, 73, 115, 129, 397, 597, 623, 769, 1131, 4581, 6229, 13477, 20995, 24541, 31089, 48535, 57375, 87151, 98543, 267443, 357829, 830103, 1141719, 1524183, 2415271, 2454363

History

• 2024-06-20: Found n = 2454363, Gary Barnes, NPLB K300 Drive 1
• 2024-06-11: Found n = 2415271, 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
• 2013-10-10: Found n = 1524183, Predrag Minovic, RPS Megabit Drive 2
• 2011-06-20: Found n = 1141719, 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, David Metcalfe
• 2008-09-25: Found n = 830103, David Metcalfe
• 2008-09-11: Reserved by David Metcalfe
• 2008-09-09: Reserved by NPLB Drive 4
• 2006-08-13: Checked to n = 600000, RPS Drive 2, released
• 2006-04-17: Found n = 357829, Larry Soule, RPS Drive 2
• 2006-03-29: Found n = 267443, Alexandre de Pereyra, RPS Drive 2
• 2006-03-17: Reserved by RPS Drive 2, for n = 210000 - 600000
• 2005-01-13: Checked to n = 210000, Steven Harvey, released
• 2005-01-10: Reserved by Steven Harvey
• 2004-07-12: Checked n = 70400 - 200000, Steven Harvey, released
• 2004-07-06: Reserved by Steven Harvey for n≤200000