|
| |
|
|
A102965
|
|
Numbers n such that 3*10^n + R_n + 8 is prime, where R_n = 11...1 is the repunit (A002275) of length n.
|
|
1
| | |
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| Also numbers n such that (28*10^n+71)/9 is prime.
|
|
|
LINKS
| Makoto Kamada, Factorizations of 311...119.
Index entries for primes involving repunits.
|
|
|
MATHEMATICA
| Do[ If[ PrimeQ[(28*10^n+71)/9], Print[n]], {n, 0, 10000}]
|
|
|
CROSSREFS
| Sequence in context: A037121 A195937 A162363 * A195936 A172145 A100931
Adjacent sequences: A102962 A102963 A102964 * A102966 A102967 A102968
|
|
|
KEYWORD
| more,nonn
|
|
|
AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 17 2004
|
|
|
EXTENSIONS
| Two more PRP terms from Serge Batalov (batalovs(AT)yahoo.com), Nov 17 2008
Addition of a(8) from Kamada data by Robert Price (pamandbobprice(AT)yahoo.com), Dec 13 2010
|
| |
|
|
