Proth primes of the form 4•3n+1

Reserved! This sequence is currently reserved by: Ryan Propper

Current data

k , b : 4 , 3 Count : 32 Nash : 1703 Max n : 5,000,000 Date : 2024-09-10 Reserved : Ryan PropperRyan Propper/Reserved

1, 2, 3, 6, 14, 15, 39, 201, 249, 885, 1005, 1254, 1635, 3306, 3522, 9602, 19785, 72698, 233583, 328689, 537918, 887535, 980925, 1154598, 1499606, 1936890, 2016951, 2143374, 4020126, 6402015, 7578378, 9214845

History

• 2020-09-10: Found n = 9214845, Ryan Propper
• 2020-09-09: Found n = 7578378, Ryan Propper
• 2020-09-09: Found n = 6402015, Ryan Propper
• 2024-09-09: Reserved by Ryan Propper for n = 5000000 - 15000000
• 2024-09-09: Checked n = 1000000 - 5000000, Ryan Propper, double-check n = 1000000 - 1500000
• 2020-09-09: Found n = 4020126, Ryan Propper
• 2024-09-06: Reserved by Ryan Propper for n = 1000000 - 5000000
• 2020-05-08: Found n = 2016951, Ryan Propper
• 2020-05-07: ?, Matthias Baur, released
• 2020-05-07: Found n = 2143374, Ryan Propper
• 2020-05-07: Found n = 1936890, Ryan Propper
• 2020-01-16: Checked n = 1200000 - 1500000, Matthias Baur
• 2020-01-16: Found n = 1499606, Matthias Baur
• 2019-12-07: Checked n = 1000000 - 1200000, Matthias Baur
• 2019-11-28: Found n = 1154598, Matthias Baur
• 2019-07-28: Checked n = 990000 - 1000000, Matthias Baur
• 2019-07-23: Checked n = 800000 - 990000, Matthias Baur
• 2019-07-12: Found n = 887535, Matthias Baur
• 2019-07-10: Found n = 980925, Matthias Baur
• 2019-06-04: Checked n = 600000 - 800000, Matthias Baur
• 2018-12-06: Checked n = 400000 - 600000, Matthias Baur
• 2018-12-06: Found n = 537918, Matthias Baur
• 2018-11-07: Checked n = 1 - 400000, Matthias Baur, double-check n = 1 - 200000
• 2018-11-07: Found n = 328689, Matthias Baur
• 2013-11-23: Checked n = 1 - 200000, Robert Price, double-check of unknown range
• 2013-11-23: Found n = 72698, Robert Price
• 2005-11-29: Found n = 233583, Boris Iskra
• 1996-12-01: Found n = 19785, Chris Caldwell
• 1996-12-01: Found n = 9602, Chris Caldwell
• 1996-03-15: Checked n = 1 - 2500?, Chris Caldwell
• 1992: Found n = 3522, Chris Caldwell
• 1992: Found n = 3306, Chris Caldwell