Difference between revisions of "Cullen prime 2"

Revision as of 08:46, 12 September 2021

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

ASCII format :	n*2^n+1
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

2021-09-11: Checked to n = 21000000, PrimeGrid Cullen Prime Search
2009-08-04: Found n = 6679881, Magnus Bergman, PrimeGrid Cullen Prime Search (Official announcement)
2009-04-20: Found n = 6328548, Dennis R. Gesker, PrimeGrid Cullen Prime Search (Official announcement)
2005-08-25: Found n = 1354828, Mark Rodenkirch
1998-09-30: Found n = 481899, Masakatu Morii
1998-07-31: Found n = 361275, Darren Smith
1998-03-08: Found n = 262419, Darren Smith
1997-05: Found n = 90825, Jeffrey Young
1997-05: Found n = 59656, Jeffrey Young
1997-05-01: Found n = 32469, Masakatu Morii
1997-05-01: Found n = 32292, Masakatu Morii
1984: Found n = 18496, Wilfrid Keller
1984: Found n = 6611, Wilfrid Keller
1984: Found n = 5795, Wilfrid Keller
1984: Found n = 4713, Wilfrid Keller
1957: Found n = 141, Raphael Robinson
1905: Found n = 1, James Cullen

@@ Line 1: / Line 1: @@
 {{Cullen prime
 |CuBase=2
-|CuMaxn=20000000
+|CuMaxn=21000000
-|CuDate=2021-08-10
+|CuDate=2021-09-11
 |CuReserved=PrimeGrid Cullen Prime Search
 |CuNlist=
+;C:{{NPr|1}}
+;C:{{NPr|141|141}}
-;40087
+;40087;C:{{NPr|4713|4713}}
-;38112
+;38112;C:{{NPr|5795|5795}}
-;37374
+;37374;C:{{NPr|6611|6611}}
-;23436;C:{{NPr|289|18502}}, [[Gen. Fermat]]
+;23436;C:{{NPr|289|18502}}, [[Generalized Fermat number]]
 ;17877;C:{{NPr|8073|32294}}
-;17850
+;17850;C:{{NPr|32469|32469}}
 ;10752;C:{{NPr|7457|59659}}
-;5931
+;5931;C:{{NPr|90825|90825}}
-;271
+;271;C:{{NPr|262419|262419}}
-;102
+;102;C:{{NPr|361275|361275}}
-;77
+;77;C:{{NPr|481899|481899}}
 1354828;75433;C:{{NPr|338707|1354830}}
 6328548;87775;C:{{NPr|1582137|6328550}}
-6679881;89536
+6679881;89536;C:{{NPr|6679881|6679881}}
 |CuRemarks=The {{OEIS|l|A005849}}<br>[http://www.primegrid.com/stats_cullen_llr.php Current status] at [[PrimeGrid]]
 }}
 ==History==
+{{HistC|2021-09-11|21000000|PrimeGrid Cullen Prime Search}}
 {{HistF|2009-08-04|6679881|Magnus Bergman,PrimeGrid Cullen Prime Search}} ([https://www.primegrid.com/download/cullen-6679881.pdf Official announcement])
 {{HistF|2009-04-20|6328548|Dennis R. Gesker,PrimeGrid Cullen Prime Search}} ([https://www.primegrid.com/download/cullen-6328548.pdf Official announcement])