A070530 Primes of form Cyclotomic[n,2^n].

5, 73, 257, 4432676798593

Offset: 1

Author

Labos Elemer, May 02 2002

Keywords

• nonn

Examples

			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.
		

Crossrefs

Cf. A070518-A070527.

Programs

Mathematica

Do[s=Cyclotomic[n, 2^n]; If[PrimeQ[s], Print[s]], {n, 1, 59}]