--- In email@example.com
Makoto Kamada <m_kamada@...> wrote:
>> Puzzle 7: Find a generalized Wieferich sequence of length > 6.
> 197, 653, 1381, 1777, 6211, 39041, 144449603
Congratulations to Makoto for a valid solution,
with the last 2 primes recorded in
In addition to Makoto's solution, I found the sequence
19739, 61729, 445631, 508009, 728437, 1051139, 5176948723
Now comes a harder puzzle, which I have not solved :-(
> Another puzzle is to find a sequence of increasing primes
> such that p[n+1] is the smallest Wieferich prime in base p[n]
> for which p[n+1] > p[n].
> Let's call this a "generalized Wieferich sequence".
Puzzle 8: Find a generalized Wieferich sequence of length > 7.