1,1
4th term is Cyclotomic[7,128]=1+128+16384+2097152+..+4398046511104=4432676798593; the next 2 known terms have almost 200 or more than 1000 decimal digits.
Do[s=Cyclotomic[n, 2^n]; If[PrimeQ[s], Print[s]], {n, 1, 59}]
Cf. A070518-A070527.
Sequence in context: A138623 A206280 A070526 * A059017 A099667 A108444
Adjacent sequences: A070527 A070528 A070529 * A070531 A070532 A070533
nonn
Labos E. (labos(AT)ana.sote.hu), May 02 2002
