- Composite exponents are in black. C±(b,n) is
almost always composite for composite exponent. The rare exceptions
are the Generalised Fermat primes C+(b,n) with b even and
n a power of 2.
- Prime exponents are coloured orange.
C±(b,n) is usually composite in this case too.
- C±(b,n) primes are coloured
green. Ignoring n=1 cases, they can only occur for n prime in
C−(2,n) (Mersenne primes) and the Generalised
Fermat primes.
- Unfactored composites are coloured red. No
factors for these composites is known.
- Hyperlinked numbers occur in previous exponents in the same or
related table.
- #Fac is the number of (non distinct) prime factors in the
expression.
- A plussed #Fac means that more prime factors exist but they are
unknown due to a unfactored composite in the expression.
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