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Difference between revisions of "Cullen prime 2"

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(21M milestone)
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{{HistF|1984|5795|Wilfrid Keller}}
 
{{HistF|1984|5795|Wilfrid Keller}}
 
{{HistF|1984|4713|Wilfrid Keller}}
 
{{HistF|1984|4713|Wilfrid Keller}}
−
{{HistF|1957|141|Raphael Robinson}}
+
{{HistF|1957|141|Raphael M. Robinson}}
 
{{HistF|1905|1|James Cullen}}
 
{{HistF|1905|1|James Cullen}}
 
{{DISPLAYTITLE:Cullen primes {{Kbn|+|n|2|n}}|noerror}}
 
{{DISPLAYTITLE:Cullen primes {{Kbn|+|n|2|n}}|noerror}}

Latest revision as of 14:54, 19 September 2021

Reserved! This sequence is currently reserved by: PrimeGrid Cullen Prime Search

Current data

Base : 2
Count : 16
Max n : 21,000,000
Date : 2021-09-11
Reserved : PrimeGrid Cullen Prime SearchPrimeGrid Cullen Prime Search/Reserved
1[1], 141[2], 4713[3], 5795[4], 6611[5], 18496[6], 32292[7], 32469[8], 59656[9], 90825[10], 262419[11], 361275[12], 481899[13], 1354828[14], 6328548[15], 6679881[16]
Remarks :
The sequence A005849 in OEIS
Current status at PrimeGrid

Notes

  1. ↑ Proth 21+1
  2. ↑ Proth 141•2141+1
  3. ↑ Proth 4713•24713+1
  4. ↑ Proth 5795•25795+1
  5. ↑ Proth 6611•26611+1
  6. ↑ Proth 289•218502+1, Generalized Fermat number
  7. ↑ Proth 8073•232294+1
  8. ↑ Proth 32469•232469+1
  9. ↑ Proth 7457•259659+1
  10. ↑ Proth 90825•290825+1
  11. ↑ Proth 262419•2262419+1
  12. ↑ Proth 361275•2361275+1
  13. ↑ Proth 481899•2481899+1
  14. ↑ Proth 338707•21354830+1
  15. ↑ Proth 1582137•26328550+1
  16. ↑ Proth 6679881•26679881+1

History

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