Base 8 has 4 possible final digits
At 1 digits, there were 4 primes, 0 leaders
At 2 digits, there were 10 primes, 0 leaders
At 3 digits, there were 14 primes, 1 leaders
At 4 digits, there were 16 primes, 5 leaders
At 5 digits, there were 13 primes, 7 leaders
At 6 digits, there were 7 primes, 4 leaders
At 7 digits, there were 3 primes, 2 leaders
At 8 digits, there were 1 primes, 1 leaders
In total, in base 8 there were 68 primes and 20 leaders, maxlen=8