OFFSET
1,1
COMMENTS
Are there any remaining composites in only one other base?
LINKS
Sebastian Petzelberger, Table of n, a(n) for n = 1..150
Carlos Rivera, PP&P Puzzle 24: Primes in several bases
CROSSREFS
KEYWORD
nonn,base,hard
AUTHOR
Sebastian Petzelberger, Mar 25 2015
STATUS
approved