Riesel primes of the form 4801•2n-1

Current data

k , b : 4801 , 2 Count : 52 Nash : 2762 Max n : 400,000 Date : 2025-03-23

1, 7, 33, 39, 43, 53, 55, 59, 79, 81, 83, 109, 113, 131, 135, 147, 349, 385, 511, 673, 687, 1011, 1103, 1481, 1605, 1711, 1775, 1951, 2529, 2941, 4087, 6065, 7823, 8639, 10333, 11325, 11585, 13115, 13887, 17913, 25685, 35541, 54343, 83741, 106301, 113543, 128151, 157069, 181423, 216065, 219259, 362867

History

• 2025-03-23: Checked n = 200000 - 400000, Riley Fisher, released
• 2025-03-22: Found n = 362867, Riley Fisher
• 2025-03-20: Found n = 216065, 219259, Riley Fisher
• 2025-03-20: Reserved by Riley Fisher for n = 200000 - 400000
• 2012-03-07: Checked n = 20000 - 200000, Oscar Tutusaus Santandreu
• 2011-02-07: Checked n = 1 - 20000, Oscar Tutusaus Santandreu
• 2007-07-06: Checked n = 1 - 10000, Gary Barnes