Base 15 has 8 possible final digits
At 1 digits, there were 6 primes, 0 leaders
At 2 digits, there were 18 primes, 2 leaders
At 3 digits, there were 36 primes, 5 leaders
At 4 digits, there were 53 primes, 10 leaders
At 5 digits, there were 64 primes, 17 leaders
At 6 digits, there were 74 primes, 32 leaders
At 7 digits, there were 56 primes, 30 leaders
At 8 digits, there were 30 primes, 13 leaders
At 9 digits, there were 20 primes, 14 leaders
At 10 digits, there were 7 primes, 4 leaders
At 11 digits, there were 3 primes, 0 leaders
At 12 digits, there were 3 primes, 0 leaders
At 13 digits, there were 3 primes, 3 leaders
In total, in base 15 there were 373 primes and 130 leaders, maxlen=13