Riesel primes of the form 4•3n-1

Current data

k , b : 4 , 3 Count : 31 Nash : 2359 Max n : 2,000,000 Date : 2021-01-26

1, 3, 5, 7, 15, 45, 95, 235, 463, 733, 1437, 1583, 1677, 1803, 4163, 4765, 9219, 9959, 25477, 26059, 41539, 54195, 65057, 74977, 116589, 192289, 311835, 350767, 353635, 416337, 423253

Remarks :

See H.C.Williams, C.R.Zarnke: "Some prime numbers of the forms 2A3^n+1 and 2A3^n-1" Math. Comp. 26 (1972), 995-998 The sequence A005540 in OEIS See also Williams 4•3n-1

History

• 2021-01-26: Checked to n = 2000000, Borys Jaworski, released
• 2020-04-04: Checked to n = 2000000, Borys Jaworski
• 2020-01-03: Checked n = 1940000 - 2000000, Borys Jaworski
• 2019-10-05: Checked n = 1930000 - 1940000, Borys Jaworski
• 2019-09-05: Checked n = 1840000 - 1930000, Borys Jaworski
• 2019-03-01: Checked n = 1810000 - 1840000, Borys Jaworski
• 2019-01-01: Checked n = 1800000 - 1810000, Borys Jaworski
• 2018-11-30: Checked n = 1780000 - 1800000, Borys Jaworski
• 2018-11-01: Checked n = 1760000 - 1780000, Borys Jaworski
• 2018-09-02: Checked n = 1720000 - 1760000, Borys Jaworski
• 2018-05-03: Checked n = 1690000 - 1720000, Borys Jaworski
• 2018-02-02: Checked n = 1680000 - 1690000, Borys Jaworski
• 2018-01-01: Checked n = 1670000 - 1680000, Borys Jaworski
• 2017-12-02: Checked n = 1660000 - 1670000, Borys Jaworski
• 2017-10-27: Checked n = 1630000 - 1660000, Borys Jaworski
• 2017-07-02: Checked n = 1610000 - 1630000, Borys Jaworski
• 2017-05-02: Checked n = 1600000 - 1610000, Borys Jaworski
• 2017-04-01: Checked n = 1570000 - 1600000, Borys Jaworski
• 2017-01-31: Checked n = 1560000 - 1570000, Borys Jaworski
• 2017-01-01: Checked n = 1550000 - 1560000, Borys Jaworski
• 2016-11-30: Checked to n = 1550000, Borys Jaworski
• 2016-11-01: Checked to n = 1550000, Borys Jaworski
• 2016-10-01: Checked to n = 1550000, Borys Jaworski
• 2016-08-31: Checked n = 1540000 - 1550000, Borys Jaworski
• 2016-07-01: Checked n = 1530000 - 1540000, Borys Jaworski
• 2016-06-01: Checked n = 1510000 - 1530000, Borys Jaworski
• 2016-04-30: Checked n = 1490000 - 1510000, Borys Jaworski
• 2016-03-31: Checked n = 1480000 - 1490000, Borys Jaworski
• 2016-02-29: Checked n = 1470000 - 1480000, Borys Jaworski
• 2016-02-01: Checked n = 1450000 - 1470000, Borys Jaworski
• 2016-01-03: Checked n = 1430000 - 1450000, Borys Jaworski
• 2015-11-30: Checked n = 1420000 - 1430000, Borys Jaworski
• 2015-10-31: Checked n = 1390000 - 1420000, Borys Jaworski
• 2015-08-31: Checked n = 1350000 - 1390000, Borys Jaworski
• 2015-06-01: Checked to n = 1350000, Borys Jaworski
• 2015-05-01: Checked to n = 1350000, Borys Jaworski
• 2015-03-31: Checked n = 1340000 - 1350000, Borys Jaworski
• 2015-02-28: Checked n = 1330000 - 1340000, Borys Jaworski
• 2015-02-01: Checked n = 1320000 - 1330000, Borys Jaworski
• 2015-01-03: Checked n = 1300000 - 1320000, Borys Jaworski
• 2014-11-01: Checked n = 1290000 - 1300000, Borys Jaworski
• 2014-09-30: Checked n = 1270000 - 1290000, Borys Jaworski
• 2014-07-30: Checked n = 1260000 - 1270000, Borys Jaworski
• 2014-06-30: Checked n = 1250000 - 1260000, Borys Jaworski
• 2014-05-01: Checked n = 1240000 - 1250000, Borys Jaworski
• 2014-03-31: Checked to n = 1240000, Borys Jaworski
• 2014-03-01: Checked n = 1220000 - 1240000, Borys Jaworski
• 2013-11-30: Checked n = 1210000 - 1220000, Borys Jaworski
• 2013-10-31: Checked n = 1200000 - 1210000, Borys Jaworski
• 2013-09-30: Checked n = 1190000 - 1200000, Borys Jaworski
• 2013-07-31: Checked to n = 1190000, Borys Jaworski
• 2013-07-01: Checked n = 1180000 - 1190000, Borys Jaworski
• 2013-06-02: Checked to n = 1180000, Borys Jaworski
• 2013-04-01: Checked n = 1170000 - 1180000, Borys Jaworski
• 2013-03-02: Checked to n = 1170000, Borys Jaworski
• 2013-01-31: Checked n = 1150000 - 1170000, Borys Jaworski
• 2012-12-01: Checked to n = 1150000, Borys Jaworski
• 2012-11-01: Checked n = 1140000 - 1150000, Borys Jaworski
• 2012-09-30: Checked n = 1130000 - 1140000, Borys Jaworski
• 2012-08-30: Checked n = 990000 - 1130000, Borys Jaworski
• 2011-09-01: Checked n = 315000 - 990000, Borys Jaworski
• 2009-01-08: Found n = 423253, Borys Jaworski
• 2008-12-14: Found n = 416337, Borys Jaworski
• 2008-05-30: Found n = 353635, Borys Jaworski
• 2008-05-23: Found n = 350767, Borys Jaworski
• 2008-03-10: Checked n = 1 - 315000, Borys Jaworski
• 2008-03-08: Found n = 311835, Borys Jaworski
• 1999-12-11: Checked n = 326 - 10000?, Robert G. Wilson, Jud McCranie
• 1972-10: Checked n = 1 - 325, Hugh C. Williams, Charles R. Zarnke