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Riesel primes of the form 21•2n-1

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Reserved! This sequence is currently reserved by: Gary Barnes

Current data

k , b : 21 , 2
Type : 3
Count : 44
Nash : 2103
Max n : 2,890,000
Date : 2021-06-27
Reserved : Gary BarnesGary Barnes/Reserved
1[1], 2[2], 3, 7[3], 10, 13, 18, 27, 37, 51, 74, 157, 271, 458, 530, 891, 1723, 1793, 1849, 1986, 2191, 2869, 4993, 7777, 11730, 15313, 29171, 35899, 36227, 71570, 199219, 233914, 297499, 332523, 348547, 538657, 986130, 999599, 1170083, 1182083, 1452771, 1872923, 2160479, 2959789
Remarks :
The sequence A002238 in OEIS

Notes

  1. S.G. n=1, Twin n=1
  2. S.G. n=2
  3. Twin n=7

History