Proth primes of the form 15•2n+1

Current data

k , b : 15 , 2 Type : 315 Count : 58 Nash : 2873 Max n : 9,000,000 Date : 2021-04-01

1, 2, 4, 9, 10, 12, 27, 37, 38, 44, 48, 78, 112, 168, 229, 297, 339, 517, 522, 654, 900, 1518, 2808, 2875, 3128, 3888, 4410, 6804, 7050, 7392, 19219, 21445, 21550, 24105, 24995, 34224, 34260, 43388, 48444, 61758, 184290, 294894, 300488, 403929, 483098, 635989, 701902, 734400, 1229600, 1244377, 1276177, 1368428, 1418605, 1597510, 1667744, 2393365, 7300254, 7619838

History

• 2021-04-01: Checked to n = 9000000, PrimeGrid Fermat Divisor Search
• 2020-12-24: Found n = 7619838, (Anonymous), PrimeGrid Fermat Divisor Search (Official Announcement)
• 2020-10-25: Found n = 7300254, Robert Gelhar, PrimeGrid Fermat Divisor Search (Official Announcement)
• 1979: Checked n = 1500 - 4000, Gordon V. Cormack, Hugh C. Williams
• 1979: Found n = 3888, Gordon V. Cormack, Hugh C. Williams
• 1979: Found n = 3128, Gordon V. Cormack, Hugh C. Williams
• 1979: Found n = 2875, Gordon V. Cormack, Hugh C. Williams
• 1979: Found n = 2808, Gordon V. Cormack, Hugh C. Williams