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Proth primes of the form 5•2n+1

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Reserved! This sequence is currently part of Multi Reservation 20: PrimeGrid Fermat Divisor Search.

Current data

k-value : 5
Count : 25
Nash : 891
Max n : 7,620,000
Date : 2020-12-28
Reserved : PrimeGridPrimeGrid/Reserved
1, 3, 7[1], 13[2], 15[3], 25[4], 39[5], 55[6], 75[7], 85[8], 127[9], 1947[10], 3313[11], 4687[12], 5947[13], 13165[14], 23473[15], 26607[16], 125413[17], 209787, 240937[18], 819739[19], 1282755[20], 1320487[21], 1777515[22]

Notes

  1. Divides: F(5), GF(5,5), GF(4,10)
  2. Divides: GF(12,12)
  3. Divides: GF(13,5), GF(14,12)
  4. Divides: F(23), GF(23,5), GF(20,10)
  5. Divides: F(36), GF(36,5), GF(35,10)
  6. Divides: GF(54,3), GF(53,5)
  7. Divides: F(73), GF(73,5), GF(72,10)
  8. Divides: GF(82,5)
  9. Divides: F(125), GF(126,3), GF(125,5), GF(126,6), GF(124,10), GF(126,12)
  10. Divides: F(1945), GF(1945,5), GF(1944,10)
  11. Divides: F(3310), GF(3310,5), GF(3306,10)
  12. Divides: GF(4686,6)
  13. Divides: GF(5946,12)
  14. Divides: GF(13164,3), GF(13161,5)
  15. Divides: F(23471), GF(23471,5), GF(23467,10)
  16. Divides: GF(26606,12)
  17. Divides: F(125410), GF(125410,5), GF(125408,10)
  18. Divides: GF(240936,3)
  19. Divides: GF(819738,3)
  20. Divides: GF(1282754,3), GF(1282748,5)
  21. Divides: GF(1320486,12)
  22. Divides: GF(1777511,5), GF(1777514,6)