Base 20 has 8 possible final digits
At 1 digits, there were 8 primes, 0 leaders
At 2 digits, there were 34 primes, 3 leaders
At 3 digits, there were 82 primes, 8 leaders
At 4 digits, there were 142 primes, 31 leaders
At 5 digits, there were 193 primes, 37 leaders
At 6 digits, there were 236 primes, 77 leaders
At 7 digits, there were 242 primes, 93 leaders
At 8 digits, there were 217 primes, 101 leaders
At 9 digits, there were 157 primes, 76 leaders
At 10 digits, there were 98 primes, 52 leaders
At 11 digits, there were 60 primes, 26 leaders
At 12 digits, there were 48 primes, 24 leaders
At 13 digits, there were 28 primes, 11 leaders
At 14 digits, there were 20 primes, 12 leaders
At 15 digits, there were 10 primes, 9 leaders
At 16 digits, there were 1 primes, 0 leaders
At 17 digits, there were 1 primes, 1 leaders
In total, in base 20 there were 1577 primes and 561 leaders, maxlen=17