OFFSET
1,1
COMMENTS
The number j must be zero or a power of 2. Checked j being powers of two through 2^20. Thus a(5) > 10^4400000. Primes of this magnitude are rare (about 1 in 10.3 million), so chance of finding one is remote with today's computer algorithms and speeds. - Robert Price, Apr 29 2013
EXAMPLE
j=0: p=1+1=2; j=1: p=2+59=61; j=2: p=4+18769=18773; j=8: p=256+37^8=124097929967680577; the j exponents are powers of 2.
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jun 01 2004
STATUS
approved