1,1

H. C. Williams and C. R. Zarnke, Math. Comp., 22 (1968), 420-422.

Y. Gallot, Proth.exe: Windows Program for Finding Large Primes

Wilfrid Keller, List of primes k.2^n - 1 for k < 300

Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime

Cf. A050522.

Cf. A002254, 5*2^n+1 is prime.

Sequence in context: A133012 A039011 A132190 this_sequence A032494 A125953 A047464

Adjacent sequences: A001767 A001768 A001769 this_sequence A001771 A001772 A001773

nonn,nice,hard

njas

More terms from Hugo Pfoertner (hugo(AT)pfoertner.org), Jun 23 2004