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A046153
Primes of the form m*2^phi(m)-1 with phi(m) the Euler function, in order of increasing m.
1
3, 11, 79, 23, 127, 191, 1114111, 1151, 5119, 6143, 654311423, 172031, 88774955854727217151, 1618481116086271, 107221699928436768767, 7421703487487, 120946279055359, 145135534866431, 47287796087390207
OFFSET
1,1
COMMENTS
Sorted along increasing n of the definition.
LINKS
MAPLE
with(numtheory); for n from 1 to 1000 do x := n*2^phi(n)-1: if isprime(x) then print(x): fi:od:
MATHEMATICA
Select[Table[m*2^EulerPhi[m]-1, {m, 1, 170}], PrimeQ] (* Jean-François Alcover, Apr 04 2011 *)
CROSSREFS
Cf. A046154.
Sequence in context: A197064 A117765 A220146 * A163856 A232468 A099341
KEYWORD
nonn,nice
AUTHOR
EXTENSIONS
More terms from Jud McCranie, Jan 26 2000
STATUS
approved