Riesel primes of the form 121•2n-1

Current data

k , b : 121 , 2 Type : Low Count : 35 Nash : 965 Max n : 10,000,000 Date : 2021-04-08

1, 3, 21, 27, 37, 43, 91, 117, 141, 163, 373, 421, 1581, 2035, 10701, 18931, 21307, 51195, 64579, 156541, 302097, 334257, 368059, 383061, 410131, 494317, 541621, 990219, 1039965, 1526097, 1589157, 1695499, 1954243, 2033941, 4553899

History

• 2021-04-08: Checked to n = 10000000, PrimeGrid 27121 Prime Search
• 2012-02-25: Found n = 4553899, Timothy D. Winslow, PrimeGrid, (Official announcement)
• 2007-12-02: Checked to n = 3016000, Justin Van Klein???
• 2006-01-28: Found n = 2033941, Szymon Banka
• 2006-01-20: Found n = 1954243, Szymon Banka
• 2005-09-06: Found n = 1695499, Rodger M. Ewing
• 2005-10-24: Found n = 1589157, Frank Clowes
• 2005-07-18: Found n = 1526097, Frank Clowes
• 2004-11-07: Found n = 1039965, Frank Clowes
• 2004-08-13: Found n = 990219, Dr. Michael E. Haas
• 2004-06-02: Found n = 541621, Frank Clowes
• 2004-06-02: Found n = 494317, Dr. Michael E. Haas
• 2004-07-21: Found n = 410131, Frank Clowes
• 2004-06-02: Found n = 383061, JF Boyer
• 2004-05-31: Found n = 368059, JF Boyer
• 2004-06-08: Found n = 334257, Rodger M. Ewing
• 2004-05-27: Found n = 302097, Rodger M. Ewing