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# Proth primes of the form 5•2n+1

 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 : PrimeGrid
 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)