|
|
A265503
|
|
Numbers n such that n*2^2203 - 1 is prime.
|
|
1
|
|
|
1, 13, 553, 861, 1983, 2065, 2403, 4371, 6226, 6553, 6580, 10128, 10998, 11193, 12411, 12598, 12909, 13056, 13194, 13399, 14589, 15829, 18429, 18436, 19315, 19900, 21574, 23599, 24006, 24024, 24415, 25704, 27225, 27651, 28689, 29461, 29805, 29868, 31143, 31186, 32674, 33706, 34306, 35016, 36118
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
The exponent of 2 in the expression, 2203, is a Mersenne exponent.
|
|
LINKS
|
|
|
EXAMPLE
|
n = 1 is a term since 2^2203 - 1 is prime (the 16th Mersenne prime).
|
|
MATHEMATICA
|
|
|
PROG
|
(MATLAB)
if isprime(n*2^2203-1)
disp(n)
end
(Magma) [n: n in [1..7*10^3] |IsPrime(n*2^2203-1)]; // Vincenzo Librandi, Dec 10 2015
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|