Base 31 has 30 possible final digits
At 1 digits, there were 10 primes, 0 leaders
At 2 digits, there were 53 primes, 1 leaders
At 3 digits, there were 168 primes, 3 leaders
At 4 digits, there were 391 primes, 42 leaders
At 5 digits, there were 729 primes, 106 leaders
At 6 digits, there were 1186 primes, 260 leaders
At 7 digits, there were 1569 primes, 455 leaders
At 8 digits, there were 1762 primes, 572 leaders
At 9 digits, there were 1800 primes, 679 leaders
At 10 digits, there were 1643 primes, 690 leaders
At 11 digits, there were 1350 primes, 630 leaders
At 12 digits, there were 971 primes, 454 leaders
At 13 digits, there were 691 primes, 348 leaders
At 14 digits, there were 450 primes, 249 leaders
At 15 digits, there were 262 primes, 158 leaders
At 16 digits, there were 124 primes, 63 leaders
At 17 digits, there were 80 primes, 44 leaders
At 18 digits, there were 41 primes, 27 leaders
At 19 digits, there were 15 primes, 13 leaders
At 20 digits, there were 2 primes, 0 leaders
At 21 digits, there were 4 primes, 2 leaders
At 22 digits, there were 2 primes, 2 leaders
In total, in base 31 there were 13303 primes and 4798 leaders, maxlen=22