Proth primes of the form 12321•2n+1

Current data

k , b : 12321 , 2 Type : 3 Count : 46 Nash : 2495 Max n : 300,000 Date : 2020-06-15

4, 24, 29, 47, 61, 63, 67, 69, 87, 101, 129, 143, 153, 249, 252, 333, 408, 561, 616, 732, 929, 1349, 3467, 6156, 6919, 9244, 14413, 17128, 20059, 20169, 20512, 23479, 24076, 26208, 27189, 34113, 37648, 43893, 45537, 63107, 79527, 88752, 118701, 122844, 164961, 218753

Remarks :

12321*2^31172227+1 is composite: RES64: [6C63541B2290ADCD] (1255044.5369s+0.0091s) 12321*2^31172248+1 is not prime. Proth RES64: 189D0996785E2095 Time : 1474819.672 sec.

History

• 2020-06-15: Checked to n = 300000, (Alex_soldier), Alexander Tsupko
• 2020-06-05: Reserved by (Alex_soldier), Alexander Tsupko upto n=50000000