A073926 Powers of 2 rearranged so that every partial sum after 1 is a proper prime power.

1, 8, 16, 2

Offset: 1

Author

Amarnath Murthy, Aug 19 2002

Keywords

• more
• nonn

Comments

If a(5) exists -- that is, if there is some k for which 2^k + 27 is a proper prime power -- then k > 100000. Or can it be proved that 2^k + 27 is either prime or has more than one distinct prime factor for all k? - Ryan Propper, Jun 17 2006

Crossrefs

Cf. A073923, A073924, A073925.