Riesel primes of the form 77•2n-1

Reserved! This sequence is currently part of Multi Reservation 4: NPLB K300 Drive 2.

Current data

k , b : 77 , 2 Count : 39 Nash : 1700 Max n : 3,100,000 Date : 2025-03-12 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 4, 14, 26, 58, 60, 64, 100, 122, 212, 566, 638, 1214, 2080, 4852, 5356, 5720, 7044, 8320, 8556, 10684, 14584, 39016, 47972, 72008, 217956, 223512, 387680, 441528, 607920, 855770, 1365452, 1390004, 1467554, 2002742, 2363352, 2387116, 2448152, 2505854

History

• 2025-03-05: Checked n = 2100000 - 300000, NPLB K300 Drive 1, double-check n = 2100000 - 2180000, released
• 2025-02-27: Reserved by NPLB K300 Drive 2 from n = 3000000
• 2024-07-05: Found n = 2505854, Florian Piesker, NPLB K300 Drive 1
• 2024-06-19: Found n = 2448152, Göran Schmidt, NPLB K300 Drive 1
• 2024-06-03: Found n = 2387116, Gary Barnes, NPLB K300 Drive 1
• 2024-05-29: Found n = 2363352, Gary Barnes, NPLB K300 Drive 1
• 2024-04-26: Reserved by NPLB K300 Drive 1 from n = 2100000
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2014-10-05: Checked n = 2005000 - 2180000, Predrag Minovic
• 2013-09-08: Checked n = 1940000 - 2005000, Predrag Minovic
• 2013-09-03: Found n = 2002742, Predrag Minovic
• 2013-07-09: Checked n = 1600000 - 1940000, Predrag Minovic
• 2013-01-04: Checked n = 1530000 - 1600000, Predrag Minovic
• 2012-07-02: Checked n = 1500000 - 1530000, Predrag Minovic
• 2011-12-31: Checked n = 1360000 - 1500000, Predrag Minovic
• 2011-08-22: Found n = 1390004, Predrag Minovic
• 2011-08-10: Found n = 1365452, Predrag Minovic
• 2011-04-12: Checked n = 1267000 - 1360000, Predrag Minovic
• 2009-07-26: Checked n = 1455000 - 1500000, Predrag Minovic, See range done at RPS other completed ranges.
• 2009-01-09: Checked n = 1652065 - 1656145, Peter Benson
• 2006-10-13: Checked n = 857000 - 1267000, Predrag Minovic
• 2006-02-09: Found n = 1467554, Predrag Minovic
• 2005-06-15: Checked n = 700000 - 857000, Predrag Minovic
• 2005-06-14: Found n = 855770, Predrag Minovic
• 2005-03-22: Checked n = 575000 - 700000, Predrag Minovic
• 2004-12-30: Checked n = 520000 - 575000, Predrag Minovic
• 2004-12-26: Found n = 607920, Predrag Minovic
• 2004-12-04: Checked n = 480000 - 520000, Predrag Minovic
• 2004-11-04: Checked n = 450000 - 480000, Predrag Minovic
• 2004-10-25: Checked n = 388000 - 450000, Predrag Minovic
• 2004-10-24: Found n = 441528, Predrag Minovic
• 2004-10-11: Checked n = 310000 - 388000, Predrag Minovic
• 2004-10-08: Found n = 387680, Predrag Minovic
• 2004-08-15: Checked n = 290000 - 310000, Predrag Minovic
• 2004-08-03: Checked n = 250000 - 290000, Predrag Minovic
• 2004-06-15: Checked to n = 250000, Predrag Minovic
• 2004-06-11: Found n = 223512, Predrag Minovic
• 2004-06-11: Found n = 217956, Predrag Minovic
• 2004-06-04: Reserved by Predrag Minovic to n = 250000
• 1994: Found n = 7044, Harvey Dubner